US3713017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency shift keyed apparatus
Assignee: Collins Radio Co
•
Filing: 1971-10-13
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Granted: 1973-01-23
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Expires: 1991-10-13
Abstract
Abstract A DIGITALIZED FSK MODULATING SYSTEM WHEREBY THE TRANSISTION BETWEEN FREQUENCIES PROVIDES SUBSTANTIALLY CONTINUOUS PHASE CHARACTERISTICS.
Inventors
- 👤 P Vena
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:25
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/20; H04L27/2003; H04L27/2021; H04L27/2025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |