Patent US3184644A successfully refreshed from Google Patents.
US3341818A
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US
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Assignee: International Business Machines Corp
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Filing: 1964-06-30
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Granted: 1967-09-12
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Expires: 1984-06-30
Abstract
No abstract record available.
Inventors
- 👤 Mackie David
- 👤 Louis A Mitta
- 👤 Jr Leo T O'connor
- 👤 William H Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:32
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/10; G06F13/12; G06F13/14; G06F13/20; G06F13/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A TRANSMISSION CONTROL UNIT FOR COMMUNICATING WITH A PLURALITY OF COMMUNICATION TERMINAL DEVICES HAVING CONTROL LINES AND DATA TRANSFER LINES, COMPRISING: A FIRST RECIRCULATING MEMORY HAVING LINE CONTROL WORDS STORED THEREIN AND ASSIGNED PARTICULAR ADDRESSES CORRESPONDING TO EACH OF THE PLURALITY OF COMMUNICATION TERMINAL DEVICES; FIRST SCANNING MEANS FOR SCANNING THE CONTROL LINES FROM SAID COMMUNICATION TERMINALS IN SYNCHRONISM WITH SAID FIRST RECIRCULATING STORE; A SECOND RECIRCULATING MEMORY HAVING A PLURALITY OF LINE CONTROL WORDS STORED THEREIN, EACH HAVING A PARTICULAR ADDRESS CORRESPONDING TO A PARTICULAR ONE OF SAID COMMUNICATION TERMINALS, AND POSITIONED IN SAID MEMORY SUCH THAT A MATCHED SCAN OCCURS CYCLICALLY BETWEEN CONTROL WORDS HAVING THE SAME ADDRESS IN SAID FIRST AND SECOND RECIRCULATING MEMORIES FOR PERMITTING DATA TRANSFER THEREBETWEEN WHENEVER A MATCHED SCAN OCCURS; AND SECOND SCANNING MEANS FOR SCANNING SAID DATA TRANSFER LINES IN SYNCHRONISM WITH SAID SECOND RECIRCULATING MEMORY, SAID SCANNING PERFORMED IN THE SAME ORDER AS THE LINE CONTROL WORDS ARE POSITIONED IN SAID SECOND MEMORY.
Claim 2
Dependent Claim
162 words
A TRANSMISSION CONTROL UNIT FOR COMMUNICATING WITH A PLURALITY OF COMMUNICATION TERMINAL DEVICES HAVING CONTROL LINES AND DATA TRANSFER LINES, COMPRISING: A FIRST RECIRCULATING MEMORY HAVING LINE CONTROL WORDS STORED THEREIN AND ASSIGNED PARTICULAR ADDRESSES CORRESPONDING TO EACH OF THE PLURALITY OF COMMUNICATION TERMINAL DEVICES; FIRST SCANNING MEANS FOR SCANNING THE CONTROL LINES FROM SAID COMMUNICATION TERMINALS IN SYNCHRONISM WITH SAID FIRST RECIRCULATING STORE; A SECOND RECIRCULATING MEMORY HAVING A PLURALITY OF LINE CONTROL WORDS STORED THEREIN, EACH HAVING A PARTICULAR ADDRESS CORRESPONDING TO A PARTICULAR ONE OF SAID COMMUNICATION TERMINALS, AND POSITIONED IN SAID MEMORY SUCH THAT A MATCHED SCAN OCCURS CYCLICALLY BETWEEN CONTROL WORDS HAVING THE SAME ADDRESS IN SAID FIRST AND SECOND RECIRCULATING MEMORIES FOR PERMITTING DATA TRANSFER THEREBETWEEN WHENEVER A MATCHED SCAN OCCURS; AND SECOND SCANNING MEANS FOR SCANNING SAID DATA TRANSFER LINES IN SYNCHRONISM WITH SAID SECOND RECIRCULATING MEMORY, SAID SCANNING PERFORMED IN THE SAME ORDER AS THE LINE CONTROL WORDS ARE POSITIONED IN SAID SECOND MEMORY.
References Cited (Backward Citations)
US2238298A
Cited
US3229259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |