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US3159821A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic core matrix

Assignee: Unisys Corp
•
Filing: 1957-09-25
•
Granted: 1964-12-01
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Expires: 1977-09-25
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Abstract

No abstract record available.

Inventors

  • 👤 Thomas D Rossing

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 22:19
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06014; G11C11/0605

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 154 words
A MEMORY MATRIX SYSTEM COMPRISING A PLURALITY OF PHYSICAL MEMORY PLANES EACH HAVING A PLURALITY OF SETS OF BISTABLE MAGNETIC CORES WITH EACH SET INCLUDING A DIFFERENT PLURALITY OF CORES, EACH DIFFERENT SET IN EACH DIFFERENT PLANE BEING A DIFFERENT BINARY WORD REGISTER, WRITING MEANS FOR CHANGING THE STATE OF EACH OF SAID CORES SELECTIVELY WHEREIN SAID MEANS INCLUDES FIRST AND SECOND WINDING MEANS FOR EACH CORE FOR CARRYING COINCIDENT CURRENTS RESPECTIVELY TO CAUSE A FIELD ALONG THE REMAMENT AXIS OF MAGNETIZATION IN THE CORES, THE FIRST WINDING MEANS FOR EACH CORE IN A GIVEN PLANE BEING INTERCONNECTED IN SERIES AND THE SECOND WINDING MEANS FOR THE CORES IN A GIVEN REGISTER IN EACH PLANE BEING SERIALLY INTERCONNECTED, AND A PLURALITY OF INTERROGATING MEANS SEPARATE FROM SAID WRITING MEANS EACH LINKING A DIFFERENT ONE AND ONLY ONE OF SAID SETS FOR CAUSING THE STATE OF THE CORES IN THE RESPECTIVE REGISTERS TO BE INTERROGATED.

References Cited (Backward Citations)

US2649568A Cited
US2832945A Cited
US2734184A Cited
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US2739300A Cited
US2700150A Cited
US2724103A Cited
GB766037A 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) 1967-12-01 1968-06-01 1968-12-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1971-12-01 1972-06-01 1972-12-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1975-12-01 1976-06-01 1976-12-01 $7700.00 Window Closed / Lapsed

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