US3128452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic storage circuits
Assignee: AT&T Inc
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Filing: 1959-05-22
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Granted: 1964-04-07
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Expires: 1979-05-22
Abstract
No abstract record available.
Inventors
- 👤 Ernest G Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:49
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
IN COMBINATION FIRST AND SECOND IDENTICAL GROUPS OF TWO-STATE DEVICES, A PAIR OF SENSING MEANS ASSOCIATED RESPECTIVELY WITH SAID GROUPS TO PRODUCE OUTPUT PULSES WHEN SAID DEVICES ARE SWITCHED FROM A FIRST OF SAID STATES TO A SECOND OF SAID STATES, FIRST MEANS RESPONSIVE TO AN INPUT SIGNAL FOR SWITCHING A PRESELECTED ONE OF SAID DEVICES IN SAID FIRST GROUP TO SAID SECOND STATE WHEN IN SAID FIRST STATE, SECOND MEANS RESPONSIVE TO SAID INPUT SIGNAL FOR SWITCHING THE DEVICE IN SAID SECOND GROUP THAT CORRESPONDS TO SAID PRESELECTED DEVICE TO SAID SECOND STATE WHEN IN SAID FIRST STATE, THIRD MEANS RESPONSIVE TO SAID OUTPUT PULSES PRODUCED BY SAID FIRST AND SECOND GROUPS SENSING MEANS FOR DIABLING SAID SECOND AND FIRST MEANS, RESPECTIVELY, FOURTH MEANS RESPONSIVE TO SAID OUTPUT PULSES PRODUCED BY SAID SECOND GROUP SENSING MEANS FOR SWITCHING SAID PRESELECTED DEVICE FROM SAID SECOND STATE TO SAID FIRST STATE, AND FIFTH MEANS RESPONSIVE TO SAID OUTPUT PULSES PRODUCED BY SAID FIRST GROUP SENSING MEANS FOR SWITCHING SAID CORRESPONDING DEVICE FROM SAID SECOND STATE TO SAID FIRST STATE.
Claim 2
Dependent Claim
178 words
IN COMBINATION FIRST AND SECOND IDENTICAL GROUPS OF TWO-STATE DEVICES, A PAIR OF SENSING MEANS ASSOCIATED RESPECTIVELY WITH SAID GROUPS TO PRODUCE OUTPUT PULSES WHEN SAID DEVICES ARE SWITCHED FROM A FIRST OF SAID STATES TO A SECOND OF SAID STATES, FIRST MEANS RESPONSIVE TO AN INPUT SIGNAL FOR SWITCHING A PRESELECTED ONE OF SAID DEVICES IN SAID FIRST GROUP TO SAID SECOND STATE WHEN IN SAID FIRST STATE, SECOND MEANS RESPONSIVE TO SAID INPUT SIGNAL FOR SWITCHING THE DEVICE IN SAID SECOND GROUP THAT CORRESPONDS TO SAID PRESELECTED DEVICE TO SAID SECOND STATE WHEN IN SAID FIRST STATE, THIRD MEANS RESPONSIVE TO SAID OUTPUT PULSES PRODUCED BY SAID FIRST AND SECOND GROUPS SENSING MEANS FOR DIABLING SAID SECOND AND FIRST MEANS, RESPECTIVELY, FOURTH MEANS RESPONSIVE TO SAID OUTPUT PULSES PRODUCED BY SAID SECOND GROUP SENSING MEANS FOR SWITCHING SAID PRESELECTED DEVICE FROM SAID SECOND STATE TO SAID FIRST STATE, AND FIFTH MEANS RESPONSIVE TO SAID OUTPUT PULSES PRODUCED BY SAID FIRST GROUP SENSING MEANS FOR SWITCHING SAID CORRESPONDING DEVICE FROM SAID SECOND STATE TO SAID FIRST STATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |