Patent US1643522A successfully refreshed from Google Patents.
Patent US3210666A successfully refreshed from Google Patents.
US3210666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier system signalling and synchronization
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1962-12-26
•
Granted: 1965-10-05
•
Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Robert J Martin
- 👤 Robert L Weeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:55
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/06; H04J1/065; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A CARRIER SYSTEM COMPRISING A TRANSMISSION MEDIUM AND FIRST AND SECOND CARRIER TERMINALS INTERCONNECT BY SAID MEDIUM, EACH SAID TERMINAL HAVING A CONTROL SIGNAL GENERATING AND REPRODUCING MEANS, A TRANSMITTING PATH, INCLUDING A DEMODULATOR, CONNECTED TO SAID MEDIIUM AND A RECEIVING PATH, INCLUDING A DEMODULATOR, CONNECTED TO SAID MEDIUM, AND A CARRIER GENERATOR COMMON TO SAID TRANSMITTING AND RECEIVING PATHS, MEANS AT EACH SAID TERMINAL GOVERNED BY SAID CONTROL SIGNAL GENERATING MEANS FOR CONTROLLING THE CONNECTION OF SAID CARRIER GENERATOR TO SAID TRANSMITTING PATH INDEPENDENTLY OF SAID MODULATOR FOR TRANSMITTING CARRIER FREQUENCY SUPERVISORY SIGNALS TO THE OTHER TERMINAL, CARRIER FREQUENCY FILTER AND AMPLIFIER MEANS AT EACH SAID TERMINAL CONNECTED TO THE RECEIVING PATH INDEPENDENTLY OF SAID DEMODULATOR AND HAVING AN OUTPUT CONNECTION TO SAID CONTROL SIGNAL REPRODUCING MEANS, SAID CARRIER FREQUENCY FILTER AND AMPLIFYING MEANS AT ONE OF SAID TERMINALS HAVING AN ADDITIONAL OUTPUT CONNECTION TO THE
Claim 2
Dependent Claim
147 words
A CARRIER SYSTEM COMPRISING A TRANSMISSION MEDIUM AND FIRST AND SECOND CARRIER TERMINALS INTERCONNECT BY SAID MEDIUM, EACH SAID TERMINAL HAVING A CONTROL SIGNAL GENERATING AND REPRODUCING MEANS, A TRANSMITTING PATH, INCLUDING A DEMODULATOR, CONNECTED TO SAID MEDIIUM AND A RECEIVING PATH, INCLUDING A DEMODULATOR, CONNECTED TO SAID MEDIUM, AND A CARRIER GENERATOR COMMON TO SAID TRANSMITTING AND RECEIVING PATHS, MEANS AT EACH SAID TERMINAL GOVERNED BY SAID CONTROL SIGNAL GENERATING MEANS FOR CONTROLLING THE CONNECTION OF SAID CARRIER GENERATOR TO SAID TRANSMITTING PATH INDEPENDENTLY OF SAID MODULATOR FOR TRANSMITTING CARRIER FREQUENCY SUPERVISORY SIGNALS TO THE OTHER TERMINAL, CARRIER FREQUENCY FILTER AND AMPLIFIER MEANS AT EACH SAID TERMINAL CONNECTED TO THE RECEIVING PATH INDEPENDENTLY OF SAID DEMODULATOR AND HAVING AN OUTPUT CONNECTION TO SAID CONTROL SIGNAL REPRODUCING MEANS, SAID CARRIER FREQUENCY FILTER AND AMPLIFYING MEANS AT ONE OF SAID TERMINALS HAVING AN ADDITIONAL OUTPUT CONNECTION TO THE
References Cited (Backward Citations)
US1797284A
Cited
US1658856A
Cited
US2836724A
Cited
US3042867A
Cited
US2871294A
Cited
US2974222A
Cited
US2903651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |