US3222653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory system for using a memory despite the presence of defective bits therein
Assignee: International Business Machines Corp
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Filing: 1961-09-18
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Granted: 1965-12-07
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Expires: 1981-09-18
Abstract
No abstract record available.
Inventors
- 👤 Rice Rex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:42
CPC Classifications
G; G11; G11C; G11C29/00; G11C29/70; G11C29/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A MEMORY SYSTEM WHICH INCLUDES A FIRST MULTIBIT MEMORY REGISTER WHICH IS SPECIFIED BY A FIRST ADDRESS AND WHICH INCLUDES ONE OR MORE BIT POSITIONS USED AS A TAG FIELD, A SECOND MULTIBIT MEMORY REGISTER HAVING A SECOND ADDRESS, THE ADDRESS OF SAID SECOND REGISTER BEING STORED IN SAID FIRST REGISTER WHEN SAID TAG FIELD IS SET TO A FIRST CONDITION, CONTROL MEANS OPERATIVE WHEN SAID MEMORY SYSTEM READS SAID FIRST MEMORY REGISTER AND RESPONSIVE TO SAID TAG FIELD TO INTERPRET THE CONTENTS OF SAID REGISTER AS THE ADDRESS OF SAID SECOND REGISTER AND TO ADDRESS AND READ OUT SAID SECOND MEMORY REGISTER, WHEREBY WHEN SAID FIRST MEMORY REGISTER IS ADDRESSED, AND SAID TAG FIELD IS SET TO SAID FIRST CONDITION, SAID SECOND REGISTER IS AUTOMATICALLY ADDRESSED AND READ OUT.
Claim 2
Dependent Claim
130 words
A MEMORY SYSTEM WHICH INCLUDES A FIRST MULTIBIT MEMORY REGISTER WHICH IS SPECIFIED BY A FIRST ADDRESS AND WHICH INCLUDES ONE OR MORE BIT POSITIONS USED AS A TAG FIELD, A SECOND MULTIBIT MEMORY REGISTER HAVING A SECOND ADDRESS, THE ADDRESS OF SAID SECOND REGISTER BEING STORED IN SAID FIRST REGISTER WHEN SAID TAG FIELD IS SET TO A FIRST CONDITION, CONTROL MEANS OPERATIVE WHEN SAID MEMORY SYSTEM READS SAID FIRST MEMORY REGISTER AND RESPONSIVE TO SAID TAG FIELD TO INTERPRET THE CONTENTS OF SAID REGISTER AS THE ADDRESS OF SAID SECOND REGISTER AND TO ADDRESS AND READ OUT SAID SECOND MEMORY REGISTER, WHEREBY WHEN SAID FIRST MEMORY REGISTER IS ADDRESSED, AND SAID TAG FIELD IS SET TO SAID FIRST CONDITION, SAID SECOND REGISTER IS AUTOMATICALLY ADDRESSED AND READ OUT.
References Cited (Backward Citations)
US3012227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |