Patent US2928901A successfully refreshed from Google Patents.
US2928901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission and reconstruction of artificial speech
Assignee: AT&T Inc
•
Filing: 1956-04-13
•
Granted: 1960-03-15
•
Expires: 1976-04-13
Abstract
No abstract record available.
Inventors
- 👤 Bruce P Bogert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:29
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66; G; G10; G10L; G10L25/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2646465A
Cited
US2151091A
Cited
US2243527A
Cited
US2407259A
Cited
US2402059A
Cited
US2577141A
Cited
US2681385A
Cited
US2701274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |