Patent US2003282A successfully refreshed from Google Patents.
US2003282A
Expired / Lapsed
US
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Wave translation system
Assignee: AT&T Inc
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Filing: 1929-12-03
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Granted: 1935-06-04
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Expires: 1949-12-03
Abstract
No abstract record available.
Inventors
- 👤 Harold S Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:10
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/06; H04B3/08; H03; H03F; H03F1/00; H03F1/34; H03F1/36; H03G; H03G9/00; H03G9/02; H03G9/04; H03G9/06; H03G9/08
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) | 1938-06-03 | 1938-12-03 | 1939-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-03 | 1942-12-03 | 1943-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-03 | 1946-12-03 | 1947-06-04 | $7700.00 | Window Closed / Lapsed |