Patent US5171314A successfully refreshed from Google Patents.
US2489824A
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Square wave generator with impulse counter timing control for frequency division
Assignee: RCA Corp
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Filing: 1943-12-24
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Granted: 1949-11-29
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Expires: 1963-12-24
Abstract
No abstract record available.
Inventors
- 👤 Eugene R Shenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:34
CPC Classifications
H; H03; H03K; H03K25/00; H03B; H03B19/00; H03B19/06; H03B19/08; H03B19/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2059562A
Cited
US2122464A
Cited
US2113011A
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US2185363A
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US2193850A
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US2185199A
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US2258943A
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US2452549A
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US2442403A
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US2403615A
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US2418521A
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US2421018A
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US2430547A
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US2442256A
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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) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |