US3559184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line adapter for data communication system
Assignee: Unisys Corp
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Filing: 1968-08-30
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Granted: 1971-01-26
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Expires: 1988-08-30
Abstract
Abstract THERE IS DESCRIBED AN ADAPTER FOR CONNECTING THE INPUTOUTPUT BUFFER OF A PROCESSOR TO A STANDARD TELEPHONE DATA SET FOR TRANSMISSION BETWEEN THE PROCESSOR AND A NUMBER OF REMOTE TERMINALS. THE ADAPTER PERMITS AUTOMATIC POLLING OF A NUMBER OF REMOTE STATIONS USING POLLING INFORMATION STORED IN THE INPUT-OUTPUT BUFFER BY THE PROCESSOR WITHOUT INTERVENTION OF THE PROCESSOR. THE ADAPTER PROVIDES TRANSLATION BETWEEN THE INTERNAL SIX-BIT CODE OF THE PROCESSING SYSTEM AND A STANDARD ASCII SEVEN-BIT CODE FOR TRANSMISSION TO OR RECEPTION FROM THE REMOTE TERMINALS. THE ADAPTER IS A SYNCHRONOUS IN ITS OPERATION.
Inventors
- 👤 Robert Louis Rawlings
- 👤 Lothar Oscar Schweigl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:02
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/14; H04L5/143; G; G06; G06F; G06F13/00; G06F13/14; G06F13/20; G06F13/22; G06F13/38; G06F13/42; G06F13/4265; G06F13/4269
Claims Analysis
Total Claims: 0
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |