US3359548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and verifying system
Assignee: Ampex Corp
•
Filing: 1964-03-27
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Granted: 1967-12-19
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Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Yoshii Hajime
- 👤 Max M Liang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:10
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/14; G06F11/1497; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1879
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN COMBINATION WITH A SOURCE OF SUCCESSIVELY PROVIDED BINARY DIGITS RANDOMLY DEFINING "1" AND "0" STATES, APPARATUS FOR RECORDING SAID DIGITS IN A RECORDING MEDIUM AND FOR VERIFYING THAT SAID DIGITS ARE PROPERLY RECORDED BY SENSING THE RECORDED DIGITS IN THE MEDIUM, SAID APPARATUS COMPRISING: A MAGNETIC MEDIUM; A SINGLE MAGNETIC HEAD COUPLED TO SAID MEDIUM; A WRITE AND A READ WINDING COUPLED TO SAID HEAD; WRITE MEANS RESPONSIVE TO THE "1" AND "0" STATES OF SAID SUCCESSIVELY PROVIDED BINARY DIGITS FOR SUCCESSIVELY INITIATING CURRENT IN SAID WRITE WINDING FOR ORIENTING THE FLUX IN THE MAGNETIC MEDIUM TO SELECTIVELY INDICATE SAID "1" OR "0" STATE; MOTOR DRIVE MEANS FOR MOVING SAID MEDIUM WITH RESPECT TO SAID HEAD AFTER SAID WRITE MEANS RESPONDS TO ONE OF SAID DIGITS;
Claim 2
Dependent Claim
127 words
IN COMBINATION WITH A SOURCE OF SUCCESSIVELY PROVIDED BINARY DIGITS RANDOMLY DEFINING "1" AND "0" STATES, APPARATUS FOR RECORDING SAID DIGITS IN A RECORDING MEDIUM AND FOR VERIFYING THAT SAID DIGITS ARE PROPERLY RECORDED BY SENSING THE RECORDED DIGITS IN THE MEDIUM, SAID APPARATUS COMPRISING: A MAGNETIC MEDIUM; A SINGLE MAGNETIC HEAD COUPLED TO SAID MEDIUM; A WRITE AND A READ WINDING COUPLED TO SAID HEAD; WRITE MEANS RESPONSIVE TO THE "1" AND "0" STATES OF SAID SUCCESSIVELY PROVIDED BINARY DIGITS FOR SUCCESSIVELY INITIATING CURRENT IN SAID WRITE WINDING FOR ORIENTING THE FLUX IN THE MAGNETIC MEDIUM TO SELECTIVELY INDICATE SAID "1" OR "0" STATE; MOTOR DRIVE MEANS FOR MOVING SAID MEDIUM WITH RESPECT TO SAID HEAD AFTER SAID WRITE MEANS RESPONDS TO ONE OF SAID DIGITS;
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |