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US2659879A
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Recognizer circuit
Assignee: Collins Radio Co
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Filing: 1952-03-27
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Granted: 1953-11-17
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Expires: 1972-03-27
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Pappenfus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:51
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/02; H04L12/12; Y; Y02; Y02D; Y02D30/00; Y02D30/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |