US1879148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for transmitting and receiving vocal sounds
Assignee: Individual
•
Filing: 1931-02-27
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Granted: 1932-09-27
•
Expires: 1951-02-27
Abstract
No abstract record available.
Inventors
- 👤 Truman E Fassett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:04
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; G; G10; G10K; G10K11/00; G10K11/18; G10K11/22; H04R1/10; H04R1/08; H04R1/083; H04R1/1016; H04R2201/00; H04R2201/10; H04R2201/107
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) | 1935-09-27 | 1936-03-28 | 1936-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-27 | 1940-03-28 | 1940-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-27 | 1944-03-28 | 1944-09-27 | $7700.00 | Window Closed / Lapsed |