US3073906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line concentrating telephone system
Assignee: AT&T Inc
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Filing: 1959-06-16
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Granted: 1963-01-15
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Expires: 1979-06-16
Abstract
No abstract record available.
Inventors
- 👤 Bock W Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:18
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/02; H04N; H04N7/00; H04N7/14; H04N7/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A LINE CONCENTRATION COMMUNICATION SYSTEM COMPRISING A CENTRAL OFFICE, A PLURALITY OF SUBSTATIONS, A FIRST AND A SECOND TRANSMISSION MEANS FOR CONNECTING SAID SUBSTATIONS TO SAID CENTRAL OFFICE, SAID FIRST AND SECOND TRANSMISSION MEANS HAVING A PLURALITY OF PAIRS OF CARRIER CHANNELS OF THE SAME FREQUENCY, THE NUMBER OF SAID PAIRS BEING LESS THAN SAID SUBSTATIONS, MEANS FOR GENERATING A SUPERVISORY SIGNAL AT EACH OF SAID SUBSTATIONS, MEANS INCLUDING A DISTINCT PAIR OF SAID CHANNELS FOR SCANNING SAID SUBSTATIONS TO DETECT SAID SIGNALS, AND MEANS RESPONSIVE TO SAID SCANNING AND DETECTING MEANS FOR ESTABLISHING A COMMUNICATION PATH BETWEEN SAID CENTRAL OFFICE AND A SUBSTATION THROUGH SAID FIRST AND SECOND MEANS ON AN IDLE PAIR OF SAID CARRIER CHANNELS.
Claim 2
Dependent Claim
118 words
A LINE CONCENTRATION COMMUNICATION SYSTEM COMPRISING A CENTRAL OFFICE, A PLURALITY OF SUBSTATIONS, A FIRST AND A SECOND TRANSMISSION MEANS FOR CONNECTING SAID SUBSTATIONS TO SAID CENTRAL OFFICE, SAID FIRST AND SECOND TRANSMISSION MEANS HAVING A PLURALITY OF PAIRS OF CARRIER CHANNELS OF THE SAME FREQUENCY, THE NUMBER OF SAID PAIRS BEING LESS THAN SAID SUBSTATIONS, MEANS FOR GENERATING A SUPERVISORY SIGNAL AT EACH OF SAID SUBSTATIONS, MEANS INCLUDING A DISTINCT PAIR OF SAID CHANNELS FOR SCANNING SAID SUBSTATIONS TO DETECT SAID SIGNALS, AND MEANS RESPONSIVE TO SAID SCANNING AND DETECTING MEANS FOR ESTABLISHING A COMMUNICATION PATH BETWEEN SAID CENTRAL OFFICE AND A SUBSTATION THROUGH SAID FIRST AND SECOND MEANS ON AN IDLE PAIR OF SAID CARRIER CHANNELS.
References Cited (Backward Citations)
US2731512A
Cited
US2773934A
Cited
US2754367A
Cited
US2802057A
Cited
US2947818A
Cited
US2951907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |