US3417265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory system
Assignee: Unisys Corp
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Filing: 1962-11-08
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Granted: 1968-12-17
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Expires: 1982-11-08
Abstract
No abstract record available.
Inventors
- 👤 Iii Edwin S Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:08
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/01; H03K3/013; G; G11; G11C; G11C15/00; G11C15/04; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
AN ASSOCIATIVE MEMORY COMPRISING AN ASSOCIATIVE SWITCHING ELEMENT HAVING TWO STORAGE STATES AND SWITCHABLE THEREBETWEEN, SAID ASSOCIATIVE SWITCHING ELEMENT INCLUDING OUTPUT MEANS FOR INDICATING THE ACTUAL STORAGE STATE OF THE ELEMENT AND INPUT CIRCUIT MEANS RESPONSIVE TO AN INPUT SIGNAL FOR COMPLEMENTING THE ACTUAL STATE THEREOF, CONTROLLABLE CIRCUIT MEANS HAVING TWO CONDUCTIVE CONDITIONS AND SWITCHABLE THEREBETWEEN CONNECTED TO SAID OUTPUT MEANS FOR TRANSMITTING AND INDICATING THE ACTUAL STORAGE STATE OF THE ELEMENT WHEN IT IS IN ONE CONTROLLED CONDUCTIVE CONDITION AND INDICATING A PRESELECTED STORAGE STATE IRRESPECTIVE OF THE ACTUAL STORAGE STATE OF THE ELEMENT WHEN IT IS IN THE OTHER CONDUCTIVE CONDITION AND A COMPARE REGISTER HAVING A COMPARE CELL COUPLED TO THE ASSOCIATIVE SWITCHING ELEMENT FOR APPLYING AN INTERROGATION SIGNAL THERETO CAUSING THE ASSOCIATIVE SWITCHING ELEMENT TO APPLY A SIGNAL TO THE CONTROLLABLE CIRCUIT ELEMENT INDICATIVE OF A CORRESPONDING BETWEEN THE STORAGE CONTENT THEREOF AND THE COMPARE CELL, THE COMPARE REGISTER INCLUDING A "DON''T CARE" CELL CORRESPONDING TO THE COMPARE CELL AND COUPLED TO THE CONTROLLABLE CIRCUIT MEANS FOR CAUSING THE OTHER CONDUCTIVE CONDITION THEREOF WHEN THE "DON''T CARE" CELL CONTAINS A PREDETERMINED STORAGE CONDITION.
Claim 2
Dependent Claim
187 words
AN ASSOCIATIVE MEMORY COMPRISING AN ASSOCIATIVE SWITCHING ELEMENT HAVING TWO STORAGE STATES AND SWITCHABLE THEREBETWEEN, SAID ASSOCIATIVE SWITCHING ELEMENT INCLUDING OUTPUT MEANS FOR INDICATING THE ACTUAL STORAGE STATE OF THE ELEMENT AND INPUT CIRCUIT MEANS RESPONSIVE TO AN INPUT SIGNAL FOR COMPLEMENTING THE ACTUAL STATE THEREOF, CONTROLLABLE CIRCUIT MEANS HAVING TWO CONDUCTIVE CONDITIONS AND SWITCHABLE THEREBETWEEN CONNECTED TO SAID OUTPUT MEANS FOR TRANSMITTING AND INDICATING THE ACTUAL STORAGE STATE OF THE ELEMENT WHEN IT IS IN ONE CONTROLLED CONDUCTIVE CONDITION AND INDICATING A PRESELECTED STORAGE STATE IRRESPECTIVE OF THE ACTUAL STORAGE STATE OF THE ELEMENT WHEN IT IS IN THE OTHER CONDUCTIVE CONDITION AND A COMPARE REGISTER HAVING A COMPARE CELL COUPLED TO THE ASSOCIATIVE SWITCHING ELEMENT FOR APPLYING AN INTERROGATION SIGNAL THERETO CAUSING THE ASSOCIATIVE SWITCHING ELEMENT TO APPLY A SIGNAL TO THE CONTROLLABLE CIRCUIT ELEMENT INDICATIVE OF A CORRESPONDING BETWEEN THE STORAGE CONTENT THEREOF AND THE COMPARE CELL, THE COMPARE REGISTER INCLUDING A "DON''T CARE" CELL CORRESPONDING TO THE COMPARE CELL AND COUPLED TO THE CONTROLLABLE CIRCUIT MEANS FOR CAUSING THE OTHER CONDUCTIVE CONDITION THEREOF WHEN THE "DON''T CARE" CELL CONTAINS A PREDETERMINED STORAGE CONDITION.
References Cited (Backward Citations)
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US3054909A
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US3244902A
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US3043964A
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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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |