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US2602136A
Expired / Lapsed
US
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Modulating and transmitting apparatus
Assignee: Unisys Corp
•
Filing: 1947-04-10
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Granted: 1952-07-01
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Expires: 1967-04-10
Abstract
No abstract record available.
Inventors
- 👤 David E Kenyon
- 👤 Hirstle M Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:08
CPC Classifications
G; G01; G01S; G01S5/00; G01S5/0009; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2042490A
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US2090359A
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US2433782A
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US2312203A
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US2368448A
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US2338395A
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US2378604A
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US2289987A
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US2403603A
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US2416327A
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US2380959A
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US2427363A
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US2420516A
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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) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |