Patent US2006969A successfully refreshed from Google Patents.
US2006969A
Expired / Lapsed
US
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Amplifying device
Assignee: Telefunken AG
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Filing: 1933-12-13
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Granted: 1935-07-02
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Expires: 1953-12-13
Abstract
No abstract record available.
Inventors
- 👤 Steimel Karl
- 👤 Klotz Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:17
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/46; H03F3/48; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/163
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) | 1938-07-01 | 1938-12-31 | 1939-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-07-01 | 1942-12-31 | 1943-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-07-01 | 1946-12-31 | 1947-07-02 | $7700.00 | Window Closed / Lapsed |