Patent US3562724A successfully refreshed from Google Patents.
US3562724A
Expired / Lapsed
US
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Recovery system for a digital magnetic recording
Assignee: Unisys Corp
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Filing: 1968-03-19
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Granted: 1971-02-09
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Expires: 1988-03-19
Abstract
Abstract A SIGNAL RECOVERY CIRCUIT FOR A DIGITAL MAGNETIC RECORDING SYSTEM IS DISCLOSED IN WHICH IS RECOVERED SIGNAL IS FED THROUGH A SERIES OF RECTIFYING STAGES EACH INTERCOUPLED TO THE NEXT VIA AN A.C. COUPLING NETWORK.
Inventors
- 👤 David G Adler
- 👤 Roland C Hollingshead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:29
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10009
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |