US2907837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound reproducing system
Assignee: Individual
•
Filing: 1956-09-18
•
Granted: 1959-10-06
•
Expires: 1976-09-18
Abstract
No abstract record available.
Inventors
- 👤 Brami Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:00
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2037187A
Cited
US2007748A
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US2007749A
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US2107757A
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US2141944A
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US2248785A
Cited
US2363985A
Cited
US2312260A
Cited
FR926861A
Cited
US2563773A
Cited
FR1005386A
Cited
GB729554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |