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US3133271A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic memory circuits

Assignee: AT&T Inc
•
Filing: 1961-09-11
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Granted: 1964-05-12
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Expires: 1981-09-11
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Abstract

No abstract record available.

Inventors

  • 👤 Donald G Clemons

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 14:30
CPC Classifications
G; G11; G11C; G11C17/00; G11C11/00; G11C11/02; G11C11/04; G11C11/12; G11C17/02; G11C5/00; G11C5/02

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 145 words
IN A MULTIPLANE MAGNETIC MEMORY MATRIX FOR STORING INFORMATION IN THE FORM OF A PATTERN OF PERMANENT MAGNETS, A FIRST AND A SECOND PLURALITY OF CONDUCTING WIRE, EACH HAVING A PREFERRED HELICAL FLUX PATH AXIALLY COINCIDENT THEREWITH, SAID HELICAL FLUX PATHS HAVING SUBSTANTIALLY RECTANGULAR HYSTERESIS CHARACTERISTICS, A PLURALITY OF INTERROGATING SOLENOIDS WRAPPED ABOUT A SUPPORT MEANS, THE PORTIONS OF SAID SOLENOIDS ON ONE SIDE OF SAID SUPPORT MEANS BEING INDUCTIVELY COUPLED TO SAID FIRST PLURALITY OF CONDUCTING WIRES AND DEFINING FIRST INFORMATION ADDRESSES THEREON, THE PORTIONS OF SAID SOLENOIDS ON THE OTHER SIDE OF SAID SUPPORT MEANS BEING INDUCTIVELY COUPLED TO SAID SECOND PLURALITY OF CONDUCTING WIRES AND DEFINING SECOND INFORMATION ADDRESSES THEREON, MEANS FOR SELECTIVELY APPLYING CURRENT PULSES TO SAID PLURALITY OF INTERROGATING SOLENOIDS, A FIRST AND A SECOND ELECTRICALLY CONDUCTING NOMAGNETIC SHEET POSITIONED NEAR SAID FIRST AND SECOND PLURALIES OF CONDUCTING WIRES, RESPECTIVELY,

References Cited (Backward Citations)

US3060411A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1967-05-12 1967-11-11 1968-05-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1971-05-12 1971-11-11 1972-05-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1975-05-12 1975-11-11 1976-05-12 $7700.00 Window Closed / Lapsed

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