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US3387220A
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Apparatus and method for synchronously demodulating frequency modulated differentially coherent duobinary signals
Assignee: Automatic Electric Laboratories Inc
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Filing: 1965-02-23
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Granted: 1968-06-04
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Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Lender Adam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14; H03; H03D; H03D1/00; H03D1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2580148A
Cited
US3022461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |