US3172114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording device
Assignee: International Business Machines Corp
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Filing: 1960-12-21
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Granted: 1965-03-02
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Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 Gene A Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:47
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/02; G11B15/00; G11B15/60; G11B15/61
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
MAGNETIC RECORDING APPARATUS COMPRISING: A HOUSING HAVING AN INTERNAL CYLINDRICAL SURFACE; AT LEAST ONE MAGNETIC TRANSDUCER MOUNTED IN THE HOUSING AND HAVING POLE PIECES EXPOSED TO THE INTERIOR THEREOF; AND A CARRIAGE FOR ROTATING A STRIP OF FLEXIBLE RECORDING MATERIAL IN CLOSE PROXIMITY TO THE CYLINDRICAL SURFACE AND THE POLE PIECES, THE CARRIAGE INCLUDING A SHAFT JOURNALED FOR ROTATION WITHIN THE HOUSING, A SLEEVE MOUNTED CONCENTRICALLY ON THE SHAFT, A PAIR OF ARMS EXTENDING FROM OPPOSITE ENDS OF THE SLEEVE RADIALLY TOWARD THE CYLINDRICAL SURFACE, MEANS CARRIED BY OPPOSITE ENDS OF THE SLEEVE FOR GUIDING THE STRIP IN A CIRCULAR PATH, AND MEANS ON THE DISTAL ENDS OF THE ARMS FOR HOLDING THE LEADING EDGE OF THE STRIP.
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |