Patent US3007145A successfully refreshed from Google Patents.
US3007145A
Expired / Lapsed
US
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Synchronizing circuit for magnetic drum
Assignee: AT&T Inc
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Filing: 1956-05-22
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Granted: 1961-10-31
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Expires: 1976-05-22
Abstract
No abstract record available.
Inventors
- 👤 Orlando J Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:49
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2085940A
Cited
US2626357A
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US2540654A
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US2609143A
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US2850720A
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US2838745A
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US2831108A
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US2794123A
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US2731590A
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US2886802A
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US2827576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |