Patent US4840613B1 successfully refreshed from Google Patents.
US3302181A
Expired / Lapsed
US
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Digital input-output buffer for computerized systems
Assignee: General Electric Co
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Filing: 1963-06-17
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Granted: 1967-01-31
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Henry P Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:59
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/14; G06F13/20; G06F13/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
AN APPARATUS FOR CONTROLLING THE TRANSFER OF DATA BETWEEN AT LEAST ONE PERIPHERAL DEVICE AND A CENTRAL PROCESSOR WHICH INCLUDES A MEMORY HAVING A PLURALITY OF DATA STORAGE LOCATIONS, SAID APPARATUS COMPRISING; ADDRESS REGISTER MEANS FOR REPRESENTING AN ADDRESS OF A GROUP OF SAID PLURALITY OF STORAGE LOCATIONS OF SAID MEMORY, CONTROL MEANS COMPRISING LOGIC CIRCUITS FOR RECEIVING SIGNALS REPRESENTING A DATA TRANSFER OPERATION TO BE EXECUTED BETWEEN A PERIPHERAL DEVICE AND SAID MEMORY, MEANS FOR INITIATING SAID TRANSFER OPERATION BETWEEN SAID PERIPHERAL DEVICE AND THE GROUP OF SAID MEMORY STORAGE LOCATIONS WHICH IS REPRESENTED BY SAID ADDRESS REGISTER, SAID CONTROL MEANS INCLUDING MEANS FOR RECEIVING A SIGNAL FROM THE CENTRAL PROCESSOR AND IN RESPONSE TO RECEIPT OF SAID SIGNAL TO RESET THE ADDRESS REGISTER MEANS DURING EXECUTION OF A TRANSFER OPERATION THEN IN PROGRESS.
Claim 2
Independent Claim
135 words
AN APPARATUS FOR CONTROLLING THE TRANSFER OF DATA BETWEEN AT LEAST ONE PERIPHERAL DEVICE AND A CENTRAL PROCESSOR WHICH INCLUDES A MEMORY HAVING A PLURALITY OF DATA STORAGE LOCATIONS, SAID APPARATUS COMPRISING; ADDRESS REGISTER MEANS FOR REPRESENTING AN ADDRESS OF A GROUP OF SAID PLURALITY OF STORAGE LOCATIONS OF SAID MEMORY, CONTROL MEANS COMPRISING LOGIC CIRCUITS FOR RECEIVING SIGNALS REPRESENTING A DATA TRANSFER OPERATION TO BE EXECUTED BETWEEN A PERIPHERAL DEVICE AND SAID MEMORY, MEANS FOR INITIATING SAID TRANSFER OPERATION BETWEEN SAID PERIPHERAL DEVICE AND THE GROUP OF SAID MEMORY STORAGE LOCATIONS WHICH IS REPRESENTED BY SAID ADDRESS REGISTER, SAID CONTROL MEANS INCLUDING MEANS FOR RECEIVING A SIGNAL FROM THE CENTRAL PROCESSOR AND IN RESPONSE TO RECEIPT OF SAID SIGNAL TO RESET THE ADDRESS REGISTER MEANS DURING EXECUTION OF A TRANSFER OPERATION THEN IN PROGRESS.
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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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |