US3209084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-acoustical transducer
Assignee: Individual
•
Filing: 1961-02-20
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Granted: 1965-09-28
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Expires: 1981-02-20
Abstract
No abstract record available.
Inventors
- 👤 Gamzon Devorah Denise
- 👤 Gamzon Miriam
- 👤 Frei Ephraim Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:09
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/04; H04R9/046; H04R9/047; H04R7/00; H04R7/02; H04R7/04; H04R7/16; H04R7/18; H04R7/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
AN ELECTRO-ACOUSTICAL TRANSDUCER COMPRISING, IN COMBINATION, AN OSCILLATABLE MEMBRANE HAVING EDGES ALONG ITS BOUNDRIES, A CONDUCTIVE STRIP CARRIED FLAT ON SAID MEMBRANE, A FRAME SUPPORTING THE EDGES OF SAID MEMBRANE, THE SIDES OF SAID MEMBRANE BEING ROUNDED OFF AT THE PLACE OF MEETING WITH ADJACENT SIDES, AND MAGNET POLE MEMBERS SUBSTANTIALLY PARALLEL TO SAID MEMBRANE, SAID FRAME HAVING TWO PORTIONS HOLDING THE EDGES OF SAID MEMBRANE THEREBETWEEN, AND MEANS FORMED IN SAID FRAME TO SUPPRESS TRANSVERSE WAVES IN SAID MEMBRANE.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |