US3090946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical information handling circuits
Assignee: AT&T Inc
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Filing: 1958-08-04
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Granted: 1963-05-21
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Expires: 1978-08-04
Abstract
No abstract record available.
Inventors
- 👤 Andrew H Bobeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:17
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/40; G; G11; G11C; G11C19/00; G11C19/005; G11C19/02; G11C19/04; G11C19/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
147 words
AN INFORMATION STORAGE CELL COMPRISING AN ELECTRICAL CONDUCTOR ELEMENT HAVING A MAGNETIC TAPE HELICALLY WOUND THEREAROUND, SAID TAPE BEING NORMALLY MAGNETIZED IN ONE DIRECTION, SAID TAPE BEING CAPABLE OF ASSUMING STABLE MAGNETIC STATES IN THE OPPOSITE DIRECTION IN DISCRETE PORTIONS THEREOF WHEN SAID PORTIONS ARE AT LEAST MINIMUM LENGTH AS DETERMINED BY THE MAGNETIC INTERACTIONS OF THE MAGNETIZATION OF THE REMAINDER OF SAID TAPE AND SAID DISCRETE PORTIONS, MEANS FOR SETTING MORE THAN TWO IMMEDIATELY ADJOINING SEGMENTS OF SAID TAPE EACH BEING LESS THAN SAID MINIMUM LENGTH TO SAID STABLE STATE IN SAID OPPOSITE DIRECTION REPRESENTATIVE OF A BINARY VALUE, READ-OUT MEANS INCLUDING A WINDING COUPLED ONLY TO AN INTERMEDIATE ONE OF SAID LAST-MENTIONED SEGMENTS FOR REVERSING THE MAGNETIC STATE OF ONLY SAID LAST-MENTIONED SEGMENT TO SAID ONE DIRECTION, AND MEANS FOR DETECTING VOLTAGE CHANGES BETWEEN THE ENDS OF SAID CONDUCTOR ELEMENT INDICATIVE OF SAID BINARY VALUE.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |