Patent US3564513A successfully refreshed from Google Patents.
US3564513A
Expired / Lapsed
US
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Address translator
Assignee: Unisys Corp
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Filing: 1969-01-31
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Granted: 1971-02-16
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Expires: 1989-01-31
Abstract
Abstract A ROTATING RECORDING SURFACE HAVING A PREDETERMINED INFORMATION FORMAT. A PLURALITY OF TRANSDUCERS READ AND WRITE ON THE SURFACE. A CONTROLLABLE TRANSDUCER SELECTION CIRCUIT AND AN ANGULAR POSITION SELECTION CIRCUIT SELECTS A TRANSDUCER AND AN ANGULAR POSITION OF A RECORDING SURFACE FOR READING AND WRITING. AN ARITHMETIC UNIT RECEIVES A CODED ADDRESS DESIGNATING A LOCATION TO BE ACCESSED AND CONVERTS THE ADDRESS TO SEPARATE TRANSDUCER SELECTION AND ANGULAR POSITION SELECTION SIGNALS FOR CONTROLLING THE RESPECTIVE SELECTION CIRCUITS.
Inventors
- 👤 John A Hibner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:00
CPC Classifications
G; G11; G11B; G11B5/00; H; H03; H03M; H03M7/00
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |