Patent US3245049A successfully refreshed from Google Patents.
US3245049A
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Means for correcting bad memory bits by bit address storage
Assignee: International Business Machines Corp
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Filing: 1963-12-24
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Granted: 1966-04-05
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Expires: 1983-12-24
Abstract
No abstract record available.
Inventors
- 👤 Fred E Sakalay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:31
CPC Classifications
G; G11; G11C; G11C29/00; G11C29/70; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/10; G06F11/1008; G06F11/1044; G11C29/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A BAD BIT MEMORY SYSTEM COMPRISING A MEMORY FOR STORING MULTI-BIT WORDS AT DISCRETE SELECTABLE ADDRESSES THEREIN SOME OF SAID WORDS BEING BAD WORDS AND SOME OF SAID WORDS BEING GOOD WORDS, MEANS FOR SELECTING A WORD FROM SAID MEMORY, MEANS FOR DETECTING A BAD WORD WHEN SO SELECTED, MEANS RESPONSIVE TO THE SELECTION OF A BAD WORD FOR IDENTIFYING THE LOCATION OF A BAD BIT THEREIN, MEANS TO CHECK THE PARITY OF SAID BAD WORD AND MEANS RESPONSIVE TO A LACK OF PARITY OF CORRECT SAID BAD BIT AT THE IDENTIFIED LOCATION THEREOF.
Claim 2
Dependent Claim
94 words
A BAD BIT MEMORY SYSTEM COMPRISING A MEMORY FOR STORING MULTI-BIT WORDS AT DISCRETE SELECTABLE ADDRESSES THEREIN SOME OF SAID WORDS BEING BAD WORDS AND SOME OF SAID WORDS BEING GOOD WORDS, MEANS FOR SELECTING A WORD FROM SAID MEMORY, MEANS FOR DETECTING A BAD WORD WHEN SO SELECTED, MEANS RESPONSIVE TO THE SELECTION OF A BAD WORD FOR IDENTIFYING THE LOCATION OF A BAD BIT THEREIN, MEANS TO CHECK THE PARITY OF SAID BAD WORD AND MEANS RESPONSIVE TO A LACK OF PARITY OF CORRECT SAID BAD BIT AT THE IDENTIFIED LOCATION THEREOF.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |