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US3130272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intercommunication system
Assignee: Talk a Phone Co
•
Filing: 1958-10-17
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Granted: 1964-04-21
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Expires: 1978-10-17
Abstract
No abstract record available.
Inventors
- 👤 Liberman Arie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:11
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN AN INTERCOMMUNICATION SYSTEM: A PLURALITY OF STATIONS; AN AMPLIFIER IN SAID SYSTEM HAVING AN INPUT AND OUTPUT; A TWO-WAY TRANSDUCER IN EACH STATION; STATION SELECTOR SWITCH MEANS IN A FIRST OF SAID STATIONS CONTROLLING INTERCONNECTION OF SAID FIRST STATION WITH A SELECTED OTHER STATION; CONDITION SELECTOR SWITCH MEANS IN SAID FIRST STATION ACTUABLE TO CONTROL CONNECTION OF THE TRANSDUCERS IN SAID FIRST AND SAID SELECTED OTHER STATIONS WITH THE INPUT AND OUTPUT OF SAID AMPLIFIER TO CARRY ON A TWO-WAY CONVERSATION; A FIRST TERMINAL IN SAID OTHER STATION CONNECTED DIRECTLY WITH THE OUTPUT OF SAID AMPLIFIER; A SECOND TERMINAL IN SAID OTHER STATION CONNECTED WITH THE STATION SELECTOR SWITCH MEANS OF SAID FIRST STATION; AND SWITCH
Claim 2
Dependent Claim
117 words
IN AN INTERCOMMUNICATION SYSTEM: A PLURALITY OF STATIONS; AN AMPLIFIER IN SAID SYSTEM HAVING AN INPUT AND OUTPUT; A TWO-WAY TRANSDUCER IN EACH STATION; STATION SELECTOR SWITCH MEANS IN A FIRST OF SAID STATIONS CONTROLLING INTERCONNECTION OF SAID FIRST STATION WITH A SELECTED OTHER STATION; CONDITION SELECTOR SWITCH MEANS IN SAID FIRST STATION ACTUABLE TO CONTROL CONNECTION OF THE TRANSDUCERS IN SAID FIRST AND SAID SELECTED OTHER STATIONS WITH THE INPUT AND OUTPUT OF SAID AMPLIFIER TO CARRY ON A TWO-WAY CONVERSATION; A FIRST TERMINAL IN SAID OTHER STATION CONNECTED DIRECTLY WITH THE OUTPUT OF SAID AMPLIFIER; A SECOND TERMINAL IN SAID OTHER STATION CONNECTED WITH THE STATION SELECTOR SWITCH MEANS OF SAID FIRST STATION; AND SWITCH
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |