Patent US2455443A successfully refreshed from Google Patents.
US2455443A
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US
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Secret radio signaling system
Assignee: RCA Corp
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Filing: 1945-10-12
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Granted: 1948-12-07
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Expires: 1965-10-12
Abstract
No abstract record available.
Inventors
- 👤 Sarnoff David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:22
CPC Classifications
G; G09; G09C; G09C5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1870989A
Cited
US1973539A
Cited
US2337553A
Cited
US2376111A
Cited
US2406811A
Cited
US2397202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-07 | 1952-06-07 | 1952-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-07 | 1956-06-07 | 1956-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-07 | 1960-06-07 | 1960-12-07 | $7700.00 | Window Closed / Lapsed |