US20030191495A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Septal occluder and associated methods
Assignee: W.L. Gore and Associates Inc
•
Filing: 2002-12-19
•
Granted: —
•
Expires: 2022-12-19
Abstract
Abstract Devices are provided for closing septal defects such as PFOs. The devices generally include a proximal anchor member, a distal anchor member, and a flexible center joint connecting the two anchor members.
Inventors
- 👤 Carol Ryan
- 👤 Andrzej Chanduszko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:11
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/0057; H; H04; H04M; H04M1/00; H04M1/68; H04M1/71; H04M1/715; H04M1/72; H04M1/725; H04M1/72502; H04M1/72505; H04W; H04W84/00; H04W84/02; H04W84/10; H04W84/14; A61B2017/00575; A61B2017/00592; A61B2017/00606; A61B2017/00831; A61B2017/00867; A61B17/04; A61B17/0469; A61B2017/0475
Claims Analysis
Total Claims: 110
Claim 1
Independent Claim
59 words
1 . A septal occluder, comprising: a proximal anchor member for deployment proximate a first end of a septal defect; a distal anchor member for deployment proximate a second end of said septal defect; and a flexible connection member connecting said proximal and distal anchor members, said proximal and distal anchor members and said connection member comprising bioresorbable materials.
Claim 2
Dependent Claim
59 words
1 . A septal occluder, comprising: a proximal anchor member for deployment proximate a first end of a septal defect; a distal anchor member for deployment proximate a second end of said septal defect; and a flexible connection member connecting said proximal and distal anchor members, said proximal and distal anchor members and said connection member comprising bioresorbable materials.
Claim 3
Dependent Claim
17 words
2 . The septal occluder of claim 1 wherein said proximal and distal anchor members are elongated.
Claim 4
Dependent Claim
24 words
3 . The septal occluder of claim 1 wherein said proximal and distal anchor members each have a generally cylindrical shape with rounded ends.
Claim 5
Dependent Claim
27 words
4 . The septal occluder of claim 1 wherein a side of each anchor member for contacting a tissue surface is generally flattened to increase surface contact.
Claim 6
Dependent Claim
27 words
5 . The septal occluder of claim 1 wherein said proximal and distal anchor members each comprise a cylindrical structure formed by rolling a layer of material.
Claim 7
Dependent Claim
17 words
6 . The septal occluder of claim 1 wherein said proximal and distal anchor members are inflatable.
Claim 8
Dependent Claim
21 words
7 . The septal occluder of claim 1 wherein said septal occluder is collapsible for passage through a catheter or sheath.
Claim 9
Dependent Claim
37 words
8 . The septal occluder of claim 7 wherein said occluder can be collapsed with the proximal and distal anchor members being in a generally aligned, end to end arrangement for passage through a catheter or sheath.
Claim 10
Dependent Claim
21 words
9 . The septal occluder of claim 1 wherein said proximal and distal anchor members are collapsible for deployment or removal.
Claim 11
Dependent Claim
18 words
10 . The septal occluder of claim 9 wherein the proximal and distal anchor members are generally foldable.
Claim 12
Dependent Claim
20 words
11 . The septal occluder of claim 10 wherein each anchor member includes two elements separated by an elastic hinge.
Claim 13
Dependent Claim
29 words
12 . The septal occluder of claim 1 further comprising a removal string attached to the septal occluder to facilitate removal of the septal occluder from the septal defect.
Claim 14
Dependent Claim
27 words
13 . The septal occluder of claim 12 wherein said removal string is slidingly mounted in said proximal anchor member and attached to said distal anchor member.
Claim 15
Dependent Claim
21 words
14 . The septal occluder of claim 12 wherein said removal string is mounted to slide through said proximal anchor member.
Claim 16
Dependent Claim
24 words
15 . The septal occluder of claim 12 further comprising a delivery string to facilitate deployment of the septal occluder at the septal defect.
Claim 17
Dependent Claim
31 words
16 . The septal occluder of claim 1 wherein said septal occluder is formed from a layer of material having opposite ends rolled to form the proximal and distal anchor members.
Claim 18
Dependent Claim
27 words
17 . The septal occluder of claim 1 further comprising a wire connecting said proximal and distal anchor members to provide clamping force to close the defect.
Claim 19
Dependent Claim
15 words
18 . The septal occluder of claim 17 wherein said wire has a serpentine configuration.
Claim 20
Dependent Claim
15 words
19 . The septal occluder of claim 1 wherein said connecting member comprises a suture.
Claim 21
Dependent Claim
19 words
20 . The septal occluder of claim 1 wherein said connecting member comprises a layer of flexible, elastomeric material.
Claim 22
Dependent Claim
24 words
21 . The septal occluder of claim 1 wherein said connecting member comprises a layer of flexible material made from thrombogenic or inflammatory materials.
Claim 23
Dependent Claim
23 words
22 . The septal occluder of claim 1 wherein said connecting member comprises a layer of flexible material that is porous or textured.
Claim 24
Dependent Claim
30 words
23 . The septal occluder of claim 1 wherein said connecting member comprises a layer of flexible material that is covered with a biocompatible glue to promote adherence to tissue
Claim 25
Dependent Claim
28 words
24 . The septal occluder of claim 1 wherein said connecting member comprises a layer of flexible material that is covered with growth factors to accelerate tissue ingrowth.
Claim 26
Dependent Claim
56 words
25 . A septal defect closure device, comprising: a proximal anchor member having a generally cylindrical shape for deployment proximate a first end of a septal defect; a distal anchor member having a generally cylindrical shape for deployment proximate a second end of said septal defect; and a suture connecting said proximal and distal anchor members.
Claim 27
Dependent Claim
56 words
25 . A septal defect closure device, comprising: a proximal anchor member having a generally cylindrical shape for deployment proximate a first end of a septal defect; a distal anchor member having a generally cylindrical shape for deployment proximate a second end of said septal defect; and a suture connecting said proximal and distal anchor members.
Claim 28
Dependent Claim
18 words
26 . The device of claim 25 wherein said suture is slidingly mounted on said proximal anchor member.
Claim 29
Dependent Claim
34 words
27 . The device of claim 26 wherein said suture includes a biasing spring at one end thereof to bias the proximal and distal anchor members toward each other when the device is deployed.
Claim 30
Dependent Claim
15 words
28 . The device of claim 25 wherein the suture comprises a shape memory wire.
Claim 31
Dependent Claim
15 words
29 . The device of claim 25 wherein said suture comprises a resilient elastomeric material.
Claim 32
Dependent Claim
26 words
30 . The device of claim 25 wherein a side of each anchor member for contacting a tissue surface is generally flattened to increase surface contact.
Claim 33
Dependent Claim
26 words
31 . The device of claim 25 wherein said proximal and distal anchor members each comprise a cylindrical structure formed by rolling a layer of material.
Claim 34
Dependent Claim
16 words
32 . The device of claim 25 wherein said proximal and distal anchor members are inflatable.
Claim 35
Dependent Claim
19 words
33 . The device of claim 25 wherein said device is collapsible for passage through a catheter or sheath.
Claim 36
Dependent Claim
36 words
34 . The device of claim 33 wherein said device can be collapsed with the proximal and distal anchor members being in a generally aligned, end to end arrangement for passage through a catheter or sheath.
Claim 37
Dependent Claim
20 words
35 . The device of claim 25 wherein said proximal and distal anchor members are collapsible for deployment or removal.
Claim 38
Dependent Claim
17 words
36 . The device of claim 35 wherein the proximal and distal anchor members are generally foldable.
Claim 39
Dependent Claim
19 words
37 . The device of claim 36 wherein each anchor member includes two elements separated by an elastic hinge.
Claim 40
Dependent Claim
26 words
38 . The device of claim 25 further comprising a removal string attached to the device to facilitate removal of the device from the septal defect.
Claim 41
Dependent Claim
26 words
39 . The device of claim 38 wherein said removal string is slidingly mounted in said proximal anchor member and attached to said distal anchor member.
Claim 42
Dependent Claim
20 words
40 . The device of claim 38 wherein said removal string is mounted to slide through said proximal anchor member.
Claim 43
Dependent Claim
22 words
41 . The device of claim 38 further comprising a delivery string to facilitate deployment of the device at the septal defect.
Claim 44
Dependent Claim
26 words
42 . The device of claim 25 further comprising a wire connecting said proximal and distal anchor members to provide clamping force to close the defect.
Claim 45
Dependent Claim
14 words
43 . The device of claim 42 wherein said wire has a serpentine configuration.
Claim 46
Dependent Claim
49 words
44 . A septal defect closure device, comprising: an elongated proximal anchor member for deployment proximate a first end of a septal defect; an elongated distal anchor member for deployment proximate a second end of said septal defect; and a flexible layer connecting said proximal and distal anchor members.
Claim 47
Dependent Claim
49 words
44 . A septal defect closure device, comprising: an elongated proximal anchor member for deployment proximate a first end of a septal defect; an elongated distal anchor member for deployment proximate a second end of said septal defect; and a flexible layer connecting said proximal and distal anchor members.
Claim 48
Dependent Claim
15 words
45 . The device of claim 44 wherein flexible layer comprises thrombogenic or inflammatory materials.
Claim 49
Dependent Claim
15 words
46 . The device of claim 44 wherein said flexible layer is porous or textured.
Claim 50
Dependent Claim
22 words
47 . The device of claim 44 wherein said flexible layer is covered with a biocompatible glue to promote adherence to tissue.
Claim 51
Dependent Claim
20 words
48 . The device of claim 44 wherein said flexible layer is covered with growth factors to accelerate tissue ingrowth.
Claim 52
Dependent Claim
16 words
49 . The device of claim 44 wherein said flexible layer comprises a resilient elastomeric material.
Claim 53
Dependent Claim
20 words
50 . The device of claim 44 wherein said flexible layer comprises a plurality of fibers connecting the anchor members.
Claim 54
Dependent Claim
23 words
51 . The device of claim 44 wherein said proximal and distal anchor members each have a generally cylindrical shape with rounded ends.
Claim 55
Dependent Claim
26 words
52 . The device of claim 44 wherein a side of each anchor member for contacting a tissue surface is generally flattened to increase surface contact.
Claim 56
Dependent Claim
26 words
53 . The device of claim 44 wherein said proximal and distal anchor members each comprise a cylindrical structure formed by rolling a layer of material.
Claim 57
Dependent Claim
16 words
54 . The device of claim 44 wherein said proximal and distal anchor members are inflatable.
Claim 58
Dependent Claim
19 words
55 . The device of claim 44 wherein said device is collapsible for passage through a catheter or sheath.
Claim 59
Dependent Claim
36 words
56 . The device of claim 55 wherein said occluder can be collapsed with the proximal and distal anchor members being in a generally aligned, end to end arrangement for passage through a catheter or sheath.
Claim 60
Dependent Claim
20 words
57 . The device of claim 44 wherein said proximal and distal anchor members are collapsible for deployment or removal.
Claim 61
Dependent Claim
17 words
58 . The device of claim 57 wherein the proximal and distal anchor members are generally foldable.
Claim 62
Dependent Claim
19 words
59 . The device of claim 58 wherein each anchor member includes two elements separated by an elastic hinge.
Claim 63
Dependent Claim
26 words
60 . The device of claim 44 further comprising a removal string attached to the device to facilitate removal of the device from the septal defect.
Claim 64
Dependent Claim
26 words
61 . The device of claim 60 wherein said removal string is slidingly mounted in said proximal anchor member and attached to said distal anchor member.
Claim 65
Dependent Claim
20 words
62 . The device of claim 60 wherein said removal string is mounted to slide through said proximal anchor member.
Claim 66
Dependent Claim
22 words
63 . The device of claim 60 further comprising a delivery string to facilitate deployment of the device at the septal defect.
Claim 67
Dependent Claim
29 words
64 . The device of claim 44 wherein said device is formed from a layer of material having opposite ends rolled to form the proximal and distal anchor members.
Claim 68
Dependent Claim
26 words
65 . The device of claim 44 further comprising a wire connecting said proximal and distal anchor members to provide clamping force to close the defect.
Claim 69
Dependent Claim
14 words
66 . The device of claim 65 wherein said wire has a serpentine configuration.
Claim 70
Dependent Claim
69 words
67 . A septal defect closure device, comprising: a proximal anchor member for deployment proximate a first end of a septal defect; a distal anchor member for deployment proximate a second end of said septal defect; a flexible connection member connecting said proximal and distal anchor members; and a removal string extending from said proximal anchor member to facilitate collapsing and removal of the device from the septal defect.
Claim 71
Dependent Claim
69 words
67 . A septal defect closure device, comprising: a proximal anchor member for deployment proximate a first end of a septal defect; a distal anchor member for deployment proximate a second end of said septal defect; a flexible connection member connecting said proximal and distal anchor members; and a removal string extending from said proximal anchor member to facilitate collapsing and removal of the device from the septal defect.
Claim 72
Dependent Claim
26 words
68 . The device of claim 67 wherein said removal string is slidingly mounted in said proximal anchor member and attached to said distal anchor member.
Claim 73
Dependent Claim
20 words
69 . The device of claim 67 wherein said removal string is mounted to slide through said proximal anchor member.
Claim 74
Dependent Claim
22 words
70 . The device of claim 67 further comprising a delivery string to facilitate deployment of the device at the septal defect.
Claim 75
Dependent Claim
20 words
71 . The device of claim 67 wherein said proximal and distal anchor members are collapsible for deployment or removal.
Claim 76
Dependent Claim
17 words
72 . The device of claim 71 wherein the proximal and distal anchor members are generally foldable.
Claim 77
Dependent Claim
19 words
73 . The device of claim 72 wherein each anchor member includes two elements separated by an elastic hinge.
Claim 78
Dependent Claim
26 words
74 . The device of claim 67 further comprising a removal string attached to the device to facilitate removal of the device from the septal defect.
Claim 79
Dependent Claim
26 words
75 . The device of claim 74 wherein said removal string is slidingly mounted in said proximal anchor member and attached to said distal anchor member.
Claim 80
Dependent Claim
20 words
76 . The device of claim 74 wherein said removal string is mounted to slide through said proximal anchor member.
Claim 81
Dependent Claim
22 words
77 . The device of claim 74 further comprising a delivery string to facilitate deployment of the device at the septal defect.
Claim 82
Dependent Claim
109 words
78 . A method of retrieving a deployed septal closure device having a proximal anchor member positioned proximate a first end of a septal defect, a distal anchor member for positioned proximate a second end of said septal defect, and a flexible connection member connecting said proximal and distal anchor members, said method comprising: moving a sheath toward the proximal anchor member; applying tension to the proximal anchor member to first withdraw the proximal anchor member into the sheath and then to withdraw the distal anchor member into the sheath; wherein the proximal and distal anchor members are generally in an end to end, aligned arrangement in said sheath.
Claim 83
Dependent Claim
109 words
78 . A method of retrieving a deployed septal closure device having a proximal anchor member positioned proximate a first end of a septal defect, a distal anchor member for positioned proximate a second end of said septal defect, and a flexible connection member connecting said proximal and distal anchor members, said method comprising: moving a sheath toward the proximal anchor member; applying tension to the proximal anchor member to first withdraw the proximal anchor member into the sheath and then to withdraw the distal anchor member into the sheath; wherein the proximal and distal anchor members are generally in an end to end, aligned arrangement in said sheath.
Claim 84
Dependent Claim
27 words
79 . The method of claim 78 further comprising moving the sheath toward the distal anchor member prior to withdrawing the distal anchor member into the sheath.
Claim 85
Dependent Claim
24 words
80 . The method of claim 78 wherein applying tension to the proximal anchor member comprises pulling a string attached to the proximal member.
Claim 86
Dependent Claim
26 words
81 . The method of claim 80 wherein said string is slidingly mounted in said proximal anchor member and is attached to said distal anchor member.
Claim 87
Dependent Claim
55 words
82 . A septal defect closure device, comprising: a proximal anchor member having a frame structure for deployment proximate a first end of a septal defect; a distal anchor member having a frame structure for deployment proximate a second end of said septal defect; and a flexible joint connecting said proximal and distal anchor members.
Claim 88
Dependent Claim
55 words
82 . A septal defect closure device, comprising: a proximal anchor member having a frame structure for deployment proximate a first end of a septal defect; a distal anchor member having a frame structure for deployment proximate a second end of said septal defect; and a flexible joint connecting said proximal and distal anchor members.
Claim 89
Dependent Claim
19 words
83 . The device of claim 82 wherein said flexible joint comprises a layer of thrombogenic or inflammatory material.
Claim 90
Dependent Claim
20 words
84 . The device of claim 82 wherein said flexible joint comprises a plurality of fibers connecting said anchor members.
Claim 91
Dependent Claim
15 words
85 . The device of claim 82 wherein said flexible joint is porous or textured.
Claim 92
Dependent Claim
16 words
86 . The device of claim 82 wherein said flexible joint comprises a resilient elastomeric material.
Claim 93
Dependent Claim
25 words
87 . The device of claim 82 wherein said flexible joint comprises two layers of flexible material joined to each other generally at centers thereof.
Claim 94
Dependent Claim
22 words
88 . The device of claim 82 wherein said anchor members each have a frame structure having a polygonal or circular structure.
Claim 95
Dependent Claim
22 words
89 . The device of claim 82 wherein said anchor members each have a frame structure having a generally “+” shaped structure.
Claim 96
Dependent Claim
22 words
90 . The device of claim 82 wherein said anchor members each have a frame structure having a generally “G” shaped structure.
Claim 97
Dependent Claim
27 words
91 . The device of claim 82 wherein said anchor members each have a collapsible frame structure to facilitate deployment of said device in a delivery catheter.
Claim 98
Dependent Claim
16 words
92 . The device of claim 82 wherein each frame structure includes metal or polymer components.
Claim 99
Dependent Claim
72 words
93 . A septal defect closure device, comprising: a proximal anchor member for deployment proximate a first end of a septal defect; a distal anchor member for deployment proximate a second end of said septal defect; and a connecting member connecting said proximal and distal anchor members, wherein the distal and proximal anchors each comprise a layer that is rolled to form a cylinder during device deployment, and generally flat after deployment.
Claim 100
Dependent Claim
72 words
93 . A septal defect closure device, comprising: a proximal anchor member for deployment proximate a first end of a septal defect; a distal anchor member for deployment proximate a second end of said septal defect; and a connecting member connecting said proximal and distal anchor members, wherein the distal and proximal anchors each comprise a layer that is rolled to form a cylinder during device deployment, and generally flat after deployment.
Claim 101
Dependent Claim
96 words
94 . An apparatus for closing a septal defect, comprising: a delivery system including a sheath having a tip positionable at the defect; and a septal occluder collapsible for delivery through the sheath for deployment at the septal defect, the septal occluder comprising: a proximal anchor member for deployment at a first end of the septal defect; a distal anchor member for deployment at a second end of said septal defect; and a flexible connection member connecting said proximal and distal anchor members, said proximal and distal anchor members and said connection member comprising bioresorbable materials.
Claim 102
Dependent Claim
96 words
94 . An apparatus for closing a septal defect, comprising: a delivery system including a sheath having a tip positionable at the defect; and a septal occluder collapsible for delivery through the sheath for deployment at the septal defect, the septal occluder comprising: a proximal anchor member for deployment at a first end of the septal defect; a distal anchor member for deployment at a second end of said septal defect; and a flexible connection member connecting said proximal and distal anchor members, said proximal and distal anchor members and said connection member comprising bioresorbable materials.
Claim 103
Dependent Claim
91 words
95 . An apparatus for closing a septal defect, comprising: a delivery system including a sheath having a tip positionable at the defect; and a septal occluder collapsible for delivery through the sheath for deployment at the septal defect, the septal occluder comprising: a proximal anchor member having a generally cylindrical shape for deployment at a first end of the septal defect; a distal anchor member having a generally cylindrical shape for deployment at a second end of said septal defect; and a suture connecting said proximal and distal anchor members.
Claim 104
Dependent Claim
91 words
95 . An apparatus for closing a septal defect, comprising: a delivery system including a sheath having a tip positionable at the defect; and a septal occluder collapsible for delivery through the sheath for deployment at the septal defect, the septal occluder comprising: a proximal anchor member having a generally cylindrical shape for deployment at a first end of the septal defect; a distal anchor member having a generally cylindrical shape for deployment at a second end of said septal defect; and a suture connecting said proximal and distal anchor members.
Claim 105
Dependent Claim
84 words
96 . An apparatus for closing a septal defect, comprising: a delivery system including a sheath having a tip positionable at the defect; and a septal occluder collapsible for delivery through the sheath for deployment at the septal defect, the septal occluder comprising: an elongated proximal anchor member for deployment at a first end of the septal defect; an elongated distal anchor member for deployment at a second end of said septal defect; and a flexible layer connecting said proximal and distal anchor members.
Claim 106
Dependent Claim
84 words
96 . An apparatus for closing a septal defect, comprising: a delivery system including a sheath having a tip positionable at the defect; and a septal occluder collapsible for delivery through the sheath for deployment at the septal defect, the septal occluder comprising: an elongated proximal anchor member for deployment at a first end of the septal defect; an elongated distal anchor member for deployment at a second end of said septal defect; and a flexible layer connecting said proximal and distal anchor members.
Claim 107
Dependent Claim
110 words
97 . An apparatus for closing a septal defect, comprising: a delivery system including a sheath having a tip positionable at the defect; and a septal occluder collapsible for delivery through the sheath for deployment at the septal defect, the septal occluder comprising: a proximal anchor member for deployment at a first end of the septal defect; a distal anchor member for deployment proximate a second end of said septal defect; a flexible connection member connecting said proximal and distal anchor members; and a removal string extending from said proximal anchor member to facilitate collapsing and removal of the occluder from the septal defect into the delivery sheath if desired.
Claim 108
Dependent Claim
110 words
97 . An apparatus for closing a septal defect, comprising: a delivery system including a sheath having a tip positionable at the defect; and a septal occluder collapsible for delivery through the sheath for deployment at the septal defect, the septal occluder comprising: a proximal anchor member for deployment at a first end of the septal defect; a distal anchor member for deployment proximate a second end of said septal defect; a flexible connection member connecting said proximal and distal anchor members; and a removal string extending from said proximal anchor member to facilitate collapsing and removal of the occluder from the septal defect into the delivery sheath if desired.
Claim 109
Dependent Claim
28 words
98 . The device of claim 67 wherein said delivery string is attached to the proximal anchor member at a generally central location on the proximal anchor member.
Claim 110
Dependent Claim
21 words
99 . The device of claim 67 wherein said removal string is usable for both removal and deployment of the device.
References Cited (Backward Citations)
US3874388A
Cited
US3824631A
Cited
US4007743A
Cited
US4149327A
Cited
US5106913A
Cited
US5534432A
Cited
US4836204A
Cited
US4840623A
Cited
US4902508A
Cited
US4917089A
Cited
US5192301A
Cited
US5620461A
Cited
US5226879A
Cited
US5078736A
Cited
US5021059A
Cited
US20020032459A1
Cited
US5108420A
Cited
US5425744A
Cited
US5222974A
Cited
US5282827A
Cited
US6077291A
Cited
US5649950A
Cited
US5486193A
Cited
US5626599A
Cited
US5316262A
Cited
US5312341A
Cited
US5275826A
Cited
US5284488A
Cited
US5312435A
Cited
US20030113868A1
Cited
US5480424A
Cited
US5507811A
Cited
US5725552A
Cited
US5433727A
Cited
US6171329B1
Cited
US5480353A
Cited
US5634936A
Cited
US5649959A
Cited
US5733337A
Cited
US5865791A
Cited
US6190353B1
Cited
US5709707A
Cited
US5717259A
Cited
US6355052B1
Cited
US5733294A
Cited
US6024756A
Cited
US5904703A
Cited
US20020099389A1
Cited
US5776183A
Cited
US5741297A
Cited
US5861003A
Cited
US5879366A
Cited
US6080182A
Cited
US5928250A
Cited
US6056760A
Cited
US6867248B1
Cited
US6245537B1
Cited
US6030007A
Cited
US6344048B1
Cited
US6071998A
Cited
US6174330B1
Cited
US6077880A
Cited
US6174322B1
Cited
US6689589B2
Cited
US6221092B1
Cited
US20020043307A1
Cited
US5919200A
Cited
US6261309B1
Cited
US6342064B1
Cited
US6371904B1
Cited
US6356782B1
Cited
US6514515B1
Cited
US6548569B1
Cited
US6838493B2
Cited
US6867247B2
Cited
US6375671B1
Cited
US6206907B1
Cited
US6379368B1
Cited
US20030120337A1
Cited
US6387104B1
Cited
US20020095174A1
Cited
US6227139B1
Cited
US6214029B1
Cited
US6867249B2
Cited
US20020034259A1
Cited
US20020058989A1
Cited
US6508828B1
Cited
US20030057156A1
Cited
US6726696B1
Cited
US20030004533A1
Cited
US20030023266A1
Cited
US20030028213A1
Cited
US20030055455A1
Cited
US7318833B2
Cited
US20040073242A1
Cited
US20050025809A1
Cited
US20050043759A1
Cited
US20070010851A1
Cited
US20060122647A1
Cited
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