US3491349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase modulation data recovery system for indicating whether consecutive data signals are the same or different
Assignee: Unisys Corp
•
Filing: 1966-10-27
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Granted: 1970-01-20
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Ernesto G Sevilla
- 👤 William Frederick Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:50
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/14; G11B20/1403; G11B20/1407; G11B20/1419
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2700155A
Cited
US3243580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |