US3303476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Input/output control
Assignee: International Business Machines Corp
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Filing: 1964-04-06
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Granted: 1967-02-07
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Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 James T Moyer
- 👤 Francis R Rausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:07
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/30; G06F9/30094; G06F12/00; G06F12/14; G06F12/1458; G06F12/1466; G06F13/00; G06F13/14; G06F13/20; G06F13/22; G06F13/24; G06F13/26; G06F13/38; G06F3/00; G06F9/22; G06F9/226; G06F9/26; G06F9/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
THE COMBINATION WITH A STORED PROGRAM CONTROLLED COMPUTER CENTRAL PROCESSING UNIT HAVING AN INTERFACE CONNECTED THERETO INCLUDING A PLURALITY OF BUS OUT DATA LINES DISPOSED FOR CONNECTION TO A PLURALITY OF REMOTE I/O CONTROL UNITS, A PLURALITY OF TAG CONTROL LINES INCLUDING ADDRESS OUT AND OPERATIONAL IN LINES, AND PERIDOCALLY PULSED SERIALLY RELATED SELECT OUT AND SELECT IN SELECTION LINES OF, ADDRESS MEANS IN THE CONTROL UNIT FOR PRODUCING ADDRESS SIGNALS DESIGNATING AN ADDRESS FOR THE CONTROL UNIT, ADDRESS MATCH MEANS CONNECTING THE ADDRESS MEANS AND THE BUS OUT LINES TO PROVIDE A SIGNAL UPON A MATCH OF AN ADDRESS PLACED ON THE BUS OUT BY THE CENTRAL UNIT WITH THAT OF THE CONTROL UNIT, MEANS JOINTLY RESPONSIVE TO THE ADDRESS MATCH SIGNAL, A PULSE ON THE SELECT OUT LINE,, AND A SIGNAL FROM THE CENTRAL UNIT ON THE ADDRESS OUT LINE CONNECTED FOR PRODUCING A RESPONSE SIGNAL FROM THE PARTICULAR CONTROL UNIT TO THE CENTRAL UNIT OVER THE OPERATIONAL IN LINE, AND SWITCH MEANS CONNECTED BETWEEN THE SELECT OUT AND SELECT IN LINES RESPONSIVE TO SAID RESPONSE SIGNAL FOR DISCONNECTING THE SELECT OUT AND SELECT IN LINES AT SAID I/O CONTROL UNIT.
Claim 2
Dependent Claim
193 words
THE COMBINATION WITH A STORED PROGRAM CONTROLLED COMPUTER CENTRAL PROCESSING UNIT HAVING AN INTERFACE CONNECTED THERETO INCLUDING A PLURALITY OF BUS OUT DATA LINES DISPOSED FOR CONNECTION TO A PLURALITY OF REMOTE I/O CONTROL UNITS, A PLURALITY OF TAG CONTROL LINES INCLUDING ADDRESS OUT AND OPERATIONAL IN LINES, AND PERIDOCALLY PULSED SERIALLY RELATED SELECT OUT AND SELECT IN SELECTION LINES OF, ADDRESS MEANS IN THE CONTROL UNIT FOR PRODUCING ADDRESS SIGNALS DESIGNATING AN ADDRESS FOR THE CONTROL UNIT, ADDRESS MATCH MEANS CONNECTING THE ADDRESS MEANS AND THE BUS OUT LINES TO PROVIDE A SIGNAL UPON A MATCH OF AN ADDRESS PLACED ON THE BUS OUT BY THE CENTRAL UNIT WITH THAT OF THE CONTROL UNIT, MEANS JOINTLY RESPONSIVE TO THE ADDRESS MATCH SIGNAL, A PULSE ON THE SELECT OUT LINE,, AND A SIGNAL FROM THE CENTRAL UNIT ON THE ADDRESS OUT LINE CONNECTED FOR PRODUCING A RESPONSE SIGNAL FROM THE PARTICULAR CONTROL UNIT TO THE CENTRAL UNIT OVER THE OPERATIONAL IN LINE, AND SWITCH MEANS CONNECTED BETWEEN THE SELECT OUT AND SELECT IN LINES RESPONSIVE TO SAID RESPONSE SIGNAL FOR DISCONNECTING THE SELECT OUT AND SELECT IN LINES AT SAID I/O CONTROL UNIT.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |