Patent US3315661A successfully refreshed from Google Patents.
US3092693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic receiver
Assignee: NTT Inc
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Filing: 1960-12-12
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Granted: 1963-06-04
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Expires: 1980-12-12
Abstract
No abstract record available.
Inventors
- 👤 Hayasaka Toshio
- 👤 Masuzawa Kenro
- 👤 Araki Ryozo
- 👤 Tajima Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
H; H04; H04R; H04R11/00; H04R11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
AN UNBALANCE-TYPE ELECTROMAGNETIC RECEIVER COMPRISING A CONICAL DIAPHRAGM, AN ARMATURE PROVIDED AT THE CENTER PORTION ON THE CONCAVE SURFACE SIDE OF SAID CONICAL DIAPHRAGM AND A MAGNETIC CIRCUIT INCLUDING A CYLINDRICAL INNER POLE JUXTAPOSED THE CENTER PORTION ON THE CONVEX SURFACE SIDE OF SAID DIAPHRAGM TO DEFINE AN AIR GAP THEREBETWEEN AND AN OUTER POLE ARRANGED CONCENTRICALLY ON THE OUTSIDE OF SAID INNER POLE.
Claim 2
Dependent Claim
64 words
AN UNBALANCE-TYPE ELECTROMAGNETIC RECEIVER COMPRISING A CONICAL DIAPHRAGM, AN ARMATURE PROVIDED AT THE CENTER PORTION ON THE CONCAVE SURFACE SIDE OF SAID CONICAL DIAPHRAGM AND A MAGNETIC CIRCUIT INCLUDING A CYLINDRICAL INNER POLE JUXTAPOSED THE CENTER PORTION ON THE CONVEX SURFACE SIDE OF SAID DIAPHRAGM TO DEFINE AN AIR GAP THEREBETWEEN AND AN OUTER POLE ARRANGED CONCENTRICALLY ON THE OUTSIDE OF SAID INNER POLE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |