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US2491810A
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Receiving system for phase-keyed pulse signals
Assignee: Radio Patents Corp
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Filing: 1946-09-18
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Granted: 1949-12-20
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Expires: 1966-09-18
Abstract
No abstract record available.
Inventors
- 👤 Guanella Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:45
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/22; H04L27/227; H04L27/2275; H04L27/2276
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1922282A
Cited
US2108117A
Cited
FR810057A
Cited
US2154073A
Cited
US2253832A
Cited
US2282971A
Cited
US2351192A
Cited
US2340432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |