US3173132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic memory circuits
Assignee: AT&T Inc
•
Filing: 1960-11-01
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Granted: 1965-03-09
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Expires: 1980-11-01
Abstract
No abstract record available.
Inventors
- 👤 Andrew H Bobeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:39
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/04; G11C11/12; G11C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
AN INFORMATION STORAGE CIRCUIT COMPRISING A MAGNETIC WIRE MEMORY ELEMENT CAPABLE OF HAVING SEGMENTS THEREOF MAGNETIZED IN ONE OR THE OTHER REMANENT MAGNETIC STATE, AN ELECTRICAL FIRST CONDUCTOR INDUCTIVELY COUPLED TO SAID MEMORY ELEMENT AND DEFINING AN INFORMATION ADDRESS SEGMENT THEREON, SAID ADDRESS SEGMENT BEING MAGNETIZED IN SAID ONE REMANENT MAGNETIC STATE, MEANS FOR APPLYING A FIRST CURRENT PULSE TO SAID CONDUCTOR FOR GENERATING A MAGNETIC FIELD OF A MAGNITUDE SUFFICIENT TO SWITCH SAID ADDRESS SEGMENT FROM SAID ONE TO SAID OTHER REMANENT MAGNETIC STATE; AND INFORMATION CONTROL MEANS COMPRISING A MAGNETICALLY PERMEABLE ELECTRICAL SECOND CONDUCTOR INDUCTIVELY ASSOCIATED WITH SAID FIRST CONDUCTOR FOR SHUNTING SAID FIELD FROM SAID ADDRESS SEGMENT TO LEAVE SAID SEGMENT IN SAID ONE REMANENT MAGNETIC STATE REPRESENTATIVE OF ONE BINARY VALUE, AND MEANS FOR APPLYING A SECOND CURRENT PULSE TO SAID SECOND CONDUCTOR SIMULTANEOUSLY WITH SAID FIRST CURRENT PULSE TO CHANGE THE PERMEABILITY OF SAID SECOND CONDUCTOR TO PERMIT SAID FIELD TO SWITCH SAID ADDRESS SEGMENT TO SAID OTHER REMANENT MAGNETIC STATE REPRESENTATIVE OF THE OTHER BINARY VALUE.
Claim 2
Dependent Claim
172 words
AN INFORMATION STORAGE CIRCUIT COMPRISING A MAGNETIC WIRE MEMORY ELEMENT CAPABLE OF HAVING SEGMENTS THEREOF MAGNETIZED IN ONE OR THE OTHER REMANENT MAGNETIC STATE, AN ELECTRICAL FIRST CONDUCTOR INDUCTIVELY COUPLED TO SAID MEMORY ELEMENT AND DEFINING AN INFORMATION ADDRESS SEGMENT THEREON, SAID ADDRESS SEGMENT BEING MAGNETIZED IN SAID ONE REMANENT MAGNETIC STATE, MEANS FOR APPLYING A FIRST CURRENT PULSE TO SAID CONDUCTOR FOR GENERATING A MAGNETIC FIELD OF A MAGNITUDE SUFFICIENT TO SWITCH SAID ADDRESS SEGMENT FROM SAID ONE TO SAID OTHER REMANENT MAGNETIC STATE; AND INFORMATION CONTROL MEANS COMPRISING A MAGNETICALLY PERMEABLE ELECTRICAL SECOND CONDUCTOR INDUCTIVELY ASSOCIATED WITH SAID FIRST CONDUCTOR FOR SHUNTING SAID FIELD FROM SAID ADDRESS SEGMENT TO LEAVE SAID SEGMENT IN SAID ONE REMANENT MAGNETIC STATE REPRESENTATIVE OF ONE BINARY VALUE, AND MEANS FOR APPLYING A SECOND CURRENT PULSE TO SAID SECOND CONDUCTOR SIMULTANEOUSLY WITH SAID FIRST CURRENT PULSE TO CHANGE THE PERMEABILITY OF SAID SECOND CONDUCTOR TO PERMIT SAID FIELD TO SWITCH SAID ADDRESS SEGMENT TO SAID OTHER REMANENT MAGNETIC STATE REPRESENTATIVE OF THE OTHER BINARY VALUE.
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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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |