US3171901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loud-speaking telephone
Assignee: AT&T Inc
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Filing: 1960-10-04
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Granted: 1965-03-02
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Expires: 1980-10-04
Abstract
No abstract record available.
Inventors
- 👤 William F Clemency
- 👤 Jr Walter D Goodale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:39
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/08; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44; H04B1/46; H04M9/10; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A LOUD-SPEAKER TELEPHONE SET COMPRISING A TRANSMITTING CHANNEL INCLUDING A MICROPHONE, A RECEIVING CHANNEL INCLUDING A LOUDSPEAKER, ATTENUATING MEANS CONNECTED TO EACH OF SAID CHANNELS, VOICE CONTROLLED MEANS CONNECTED TO SAID ATTENUATING MEANS FOR INVERSELY VARYING THE GAINS OF SAID CHANNELS WITH RESPECT TO EACH OTHER, DISCRIMINATING MEANS FOR DERIVING AN ELECTRICAL SIGNAL SUBSTANTIALLY PROPORTIONAL TO SLOWLY VARYING NOSE WAVES TRANSLATED BY SAID TRANSMITTING CHANNEL, AND MEANS RESPONSIVE TO SAID ELECTRICAL SIGNAL FOR CONTROLLING THE SENSITIVITY OF SAID VOICE CONTROLLED MEANS.
Claim 2
Dependent Claim
81 words
A LOUD-SPEAKER TELEPHONE SET COMPRISING A TRANSMITTING CHANNEL INCLUDING A MICROPHONE, A RECEIVING CHANNEL INCLUDING A LOUDSPEAKER, ATTENUATING MEANS CONNECTED TO EACH OF SAID CHANNELS, VOICE CONTROLLED MEANS CONNECTED TO SAID ATTENUATING MEANS FOR INVERSELY VARYING THE GAINS OF SAID CHANNELS WITH RESPECT TO EACH OTHER, DISCRIMINATING MEANS FOR DERIVING AN ELECTRICAL SIGNAL SUBSTANTIALLY PROPORTIONAL TO SLOWLY VARYING NOSE WAVES TRANSLATED BY SAID TRANSMITTING CHANNEL, AND MEANS RESPONSIVE TO SAID ELECTRICAL SIGNAL FOR CONTROLLING THE SENSITIVITY OF SAID VOICE CONTROLLED MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |