Patent US3290664A successfully refreshed from Google Patents.
US3290664A
Expired / Lapsed
US
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Read-only magnetic memory
Assignee: RCA Corp
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Filing: 1962-10-23
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Granted: 1966-12-06
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Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Chia Y Hsueh
- 👤 Henry P Cichon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:55
CPC Classifications
H; H03; H03M; H03M1/00; G; G11; G11C; G11C17/00; G11C17/02; H03M1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A MEMOROY CONSTRUCTION FOR THE STORAGE OF M WORDS EACH HAVING N BITS, WHERE M AND N ARE EACH GREATER THAN ONE, COMPRISING, N MAGNETIC CORES EACH HAVING TWO APERTURES WITH A CENTRAL MAGNETIC LEG THEREBETWEEN, M PRIMARY WINDINGS EACH EXTENDING THROUGH ONE APERTURE OF EACH OF SAID MAGNETIC CORES, A PRIMARY WINDING EXTENDING THROUGH ONE APERTURE OF A CORE TO STORE A "0," AND A PRIMARY WINDING EXTENDING THROUGH THE OTHER APERTURE OF A CORE TO STORE A "2," AND A SECONDARY WINDING WOUND AROUND THE CENTRAL LEG OF EACH OF SAID MAGNETIC CORES.
Claim 2
Dependent Claim
95 words
A MEMOROY CONSTRUCTION FOR THE STORAGE OF M WORDS EACH HAVING N BITS, WHERE M AND N ARE EACH GREATER THAN ONE, COMPRISING, N MAGNETIC CORES EACH HAVING TWO APERTURES WITH A CENTRAL MAGNETIC LEG THEREBETWEEN, M PRIMARY WINDINGS EACH EXTENDING THROUGH ONE APERTURE OF EACH OF SAID MAGNETIC CORES, A PRIMARY WINDING EXTENDING THROUGH ONE APERTURE OF A CORE TO STORE A "0," AND A PRIMARY WINDING EXTENDING THROUGH THE OTHER APERTURE OF A CORE TO STORE A "2," AND A SECONDARY WINDING WOUND AROUND THE CENTRAL LEG OF EACH OF SAID MAGNETIC CORES.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |