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Patent US2924670A successfully refreshed from Google Patents.
US2924670A
Expired / Lapsed
US
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Portable telephone-control unit
Assignee: Dynamics Corp of America
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Filing: 1954-04-30
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Granted: 1960-02-09
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Expires: 1974-04-30
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Dee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:27
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/3827
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2193536A
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US2215860A
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US2250936A
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US2433290A
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US2496398A
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US2531215A
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US2535906A
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US2547420A
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US2647959A
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US2684436A
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US2670435A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |