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US1819627A
Expired / Lapsed
US
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Sound reproducer and method of manufacturing the same
Assignee: BRANDES LAB Inc
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Filing: 1925-10-08
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Granted: 1931-08-18
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Expires: 1945-10-08
Abstract
No abstract record available.
Inventors
- 👤 Le Roy W Staunton
- 👤 Cyril A Brigham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:06
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-08-17 | 1935-02-16 | 1935-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-17 | 1939-02-16 | 1939-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-17 | 1943-02-16 | 1943-08-18 | $7700.00 | Window Closed / Lapsed |