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US2611809A
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Control switching system for automatic exposure timers
Assignee: MICRO RECORDING Co
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Filing: 1947-07-05
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Granted: 1952-09-23
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Expires: 1967-07-05
Abstract
No abstract record available.
Inventors
- 👤 Robert H Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:54
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2515762A
Cited
US1516646A
Cited
US1998950A
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US2104128A
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US2157690A
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US2207055A
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US2223163A
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US2274158A
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US2259287A
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US2370727A
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US2451997A
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US2414443A
Cited
US2422020A
Cited
US2433254A
Cited
US2434101A
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US2538789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |