Patent US3131383A successfully refreshed from Google Patents.
US3131383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single bit recording technique
Assignee: International Business Machines Corp
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Filing: 1960-02-08
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Granted: 1964-04-28
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Expires: 1980-02-08
Abstract
No abstract record available.
Inventors
- 👤 William E Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:19
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
A DATA STORAGE SYSTEM COMPRISING MAGNETIC RECORDING MEANS INCLUDING A RECORDING HEAD AND A RELATIVELY MOVABLE RECORDING MEDIUM PROVIDING A MAGNETIC RECORDING SURFACE OF WHICH EACH RECORDING AREA IS CYCLICALLY AND REPETITIVELY PRESENTED TO SAID HEAD TO RECORD IN SERIAL ORDER DATA BITS OF A CHARACTER IN SUCCESSIVE BIT RECORDING POSITIONS FORMING A CONTINUOUS RECORDING TRACK ON SAID SURFACE, ENERGIZING MEANS FOR RECEIVING DATA TO BE RECORDED AND RESPONSIVE THERETO FOR ENERGIZING SAID RECORDING HEAD TO EFFECT A RECORDING OF SAID DATA, ADDRESSING MEANS RESPONSIVE TO A CONTROL SIGNAL FOR CONTROLLING SAID ENERGIZING MEANS TO PERMIT RECORDING IN SAID TRACK OF A SINGLE BIT OF A CHARACTER ONCE EACH COMPLETE TRAVERSE OF SAID TRACK AND TO PERMIT RECORDING OF SUCCESSIVE DATA BITS IN SUCCESSIVE ONES OF SAID BIT RECORDING POSITIONS
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |