US3136851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic telegraph test line
Assignee: AT&T Inc
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Filing: 1961-11-15
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Granted: 1964-06-09
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Expires: 1981-11-15
Abstract
No abstract record available.
Inventors
- 👤 Fred B Crowson
- 👤 Vince M Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:31
CPC Classifications
H; H04; H04L; H04L43/00; H04L43/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
IN A DATA SYSTEM, A PLURALITY OF TRANSMISSION LINES, FIRST SIGNALING MEANS INCLUDING A FIRST AND SECOND OUTPUT FOR TRANSMITTING A DATA SIGNAL MESSAGE DURING REPEATED INTERVALS, SECOND SIGNALING MEANS FOR TRANSMITTING A FIRST AND SECOND DATA SIGNAL SEQUENCE DURING A FIRST AND SECOND INTERVAL, RESPECTIVELY, MEANS RESPONSIVE TO A CALL FROM ANY ONE OF SAID LINES FOR EXTENDING SAID ONE LINE TO SAID SECOND SIGNALING MEANS DURING SAID FIRST INTERVAL, MEANS RESPONSIVE TO THE TERMINATION OF SAID FIRST INTERVAL FOR EXTENDING SAID ONE LINE TO SAID FIRST OUTPUT OF SAID FIRST SIGNALING MEANS DURING SAID MESSAGE INTERVAL, MEANS RESPONSIVE TO THE TERMINATION OF SAID MESSAGE INTERVAL FOR EXTENDING SAID ONE LINE TO SAID SECOND SIGNALING MEANS DURING SAID SECOND INTERVAL, AND MEANS RESPONSIVE TO THE TERMINATION OF SAID SECOND INTERVAL FOR EXTENDING SAID ONE LINE TO SAID SECOND OUTPUT OF SAID FIRST SIGNALING MEANS DURING SAID MESSAGE INTERVAL.
References Cited (Backward Citations)
US3084231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |