US3410964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way long distance voice communication system with signal lamps
Assignee: Nortel Networks Ltd
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Filing: 1965-07-21
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Granted: 1968-11-12
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Expires: 1985-07-21
Abstract
No abstract record available.
Inventors
- 👤 Kelsey Ernest Starkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:41
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A TWO-WAY VOICE COMMUNICATION SYSTEM HAVING A PAIR OF STATIONS, EACH STATION HAVING A TRANSMISSION PATH FOR TRANSMITTING VOICE SIGNALS AND A RECEPTION PATH FOR RECEIVING VOICE SIGNAL TRANSMITTED FROM THE OPPOSITE STATION; THE IMPROVEMENT AT EACH STATION COMPRISING; A FIRST GENERATING MEANS FOR GENERATING A FIRST PULSE IN RESPONSE TO VOICE SIGNAL CURRENTS IN THE TRANSMISSION PATH; A SECOND GENERATING MEANS FOR GENERATING A SECOND SIGNAL PULSE IN RESPONSE TO VOICE SIGNAL CURRENTS IN THE RECEPTION PATH; PULSE FREQUENCY DIVIDER MEANS HAVING AN INPUT AND AN OUTPUT, SAID PULSE FREQUENCY DIVIDER MEANS ARRANGED TO PRODUCE A SIGNAL AT SAID OUPUT FOR ALTERNATELY ACTIVATING AND DEACTIVATING A VISUAL SIGNALLING DEVICE IN RESPONSE TO THE TERMINATION OF SUCCESSIVE PULSES RECEIVED AT SAID INPUT FROM SAID GENERATING MEANS.
Claim 2
Dependent Claim
127 words
IN A TWO-WAY VOICE COMMUNICATION SYSTEM HAVING A PAIR OF STATIONS, EACH STATION HAVING A TRANSMISSION PATH FOR TRANSMITTING VOICE SIGNALS AND A RECEPTION PATH FOR RECEIVING VOICE SIGNAL TRANSMITTED FROM THE OPPOSITE STATION; THE IMPROVEMENT AT EACH STATION COMPRISING; A FIRST GENERATING MEANS FOR GENERATING A FIRST PULSE IN RESPONSE TO VOICE SIGNAL CURRENTS IN THE TRANSMISSION PATH; A SECOND GENERATING MEANS FOR GENERATING A SECOND SIGNAL PULSE IN RESPONSE TO VOICE SIGNAL CURRENTS IN THE RECEPTION PATH; PULSE FREQUENCY DIVIDER MEANS HAVING AN INPUT AND AN OUTPUT, SAID PULSE FREQUENCY DIVIDER MEANS ARRANGED TO PRODUCE A SIGNAL AT SAID OUPUT FOR ALTERNATELY ACTIVATING AND DEACTIVATING A VISUAL SIGNALLING DEVICE IN RESPONSE TO THE TERMINATION OF SUCCESSIVE PULSES RECEIVED AT SAID INPUT FROM SAID GENERATING MEANS.
References Cited (Backward Citations)
US2472585A
Cited
US3370294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |