US4471493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wireless telephone extension unit with self-contained dipole antenna
Assignee: AG Communication Systems Corp
•
Filing: 1982-12-16
•
Granted: 1984-09-11
•
Expires: 2002-12-16
Abstract
Abstract A remote unit for use in a wireless extension telephone system having a self-contained dipole antenna. Utilizing the unique construction of the telephone instrument housing one element of the dipole is included in a planar element that functions normally to direct sound to a self-contained microphone and the other element of the antenna is a static shield used to protect components on printed circuit board included within the extension unit.
Inventors
- 👤 Edward A. Schober
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:12
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/034; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H04M; H04M1/00; H04M1/02; H04M1/0202; H04M1/0206; H04M1/0208; H04M1/0214; H04M1/0216
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A wireless extension telephone remote unit including: a housing; a printed circuit board included within said housing; a radio transmitter circuit located on said printed circuit board; a first antenna element included within said housing and located adjacent to said printed circuit board and electrically connected to said radio transmitter; a planar unit flexibly mounted to said housing; and a second antenna element located on said planar unit and electrically connected to said radio transmitter; said first antenna element and said second antenna element in combination comprising a dipole antenna connected to said radio transmitter.
Claim 2
Dependent Claim
95 words
A wireless extension telephone remote unit including: a housing; a printed circuit board included within said housing; a radio transmitter circuit located on said printed circuit board; a first antenna element included within said housing and located adjacent to said printed circuit board and electrically connected to said radio transmitter; a planar unit flexibly mounted to said housing; and a second antenna element located on said planar unit and electrically connected to said radio transmitter; said first antenna element and said second antenna element in combination comprising a dipole antenna connected to said radio transmitter.
Claim 3
Dependent Claim
21 words
A wireless extension telephone remote unit as claimed in claim 1 wherein: said planar unit is hingedly mounted to said housing.
Claim 4
Dependent Claim
38 words
A wireless extension telephone remote unit as claimed in claim 2 wherein: said transmitter is disabled by a switching means actuated by said planar unit when said planar unit is folded on said hinged mounting against said housing.
Claim 5
Dependent Claim
40 words
A wireless extension telephone remote unit as claimed in claim 1 wherein: there is further included spring means positioned between said housing and said planar unit, operated to move said planar unit from a first location to a second location.
Claim 6
Dependent Claim
22 words
A wireless extension telephone remote unit as claimed in claim 4 wherein: said second antenna element is comprised of a metallic plate.
Claim 7
Dependent Claim
26 words
A wireless extension telephone remote unit as claimed in claim 5 wherein: said spring means is electrically connected between said radio transmitter and said metallic plate.
Claim 8
Dependent Claim
21 words
A wireless extension telephone remote unit as claimed in claim 1 wherein: said housing unit is constructed of electrically insulated material.
Claim 9
Dependent Claim
21 words
A wireless extension telephone remote unit as claimed in claim 1 wherein: said planar unit is constructed of electrically insulated material.
Claim 10
Dependent Claim
22 words
A wireless extension telephone remote unit as claimed in claim 1 wherein: said dipole antenna is further connected to a radio receiver.
Claim 11
Dependent Claim
24 words
A wireless extension telephone remote unit as claimed in claim 1 wherein: said first antenna element comprises a static shield constructed to metallic foil.
References Cited (Backward Citations)
US2828413A
Cited
US3824465A
Cited
US3980952A
Cited
US4123756A
Cited
USD254435S
Cited
US4344184A
Cited
US4397035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |