US3102929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speech-signal transmission system
Assignee: US Philips Corp
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Filing: 1959-03-26
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Granted: 1963-09-03
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Expires: 1979-03-26
Abstract
No abstract record available.
Inventors
- 👤 Jager Frank De
- 👤 Petrus Josephus Van Gerwen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:56
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A TRANSMISSION SYSTEM FOR SPEECH SIGNALS COMPRISING A TRANSMITTER HAVING A BAND COMPRESSION DEVICE, AND A RECEIVER HAVING A BAND EXPANSION DEVICE; SAID BAND COMPRESSION DEVICE COMPRISING A PLURALITY OF CHANNELS, MEANS APPLYING SIGNALS OF DIFFERENT FORMANT REGIONS TO SAID CHANNELS, ONE OF SAID CHANNELS PASSING SIGNALS WITHOUT COMPRESSION, THE REMAINDER OF SAID CHANNELS EACH COMPRISING A FORMANT FREQUENCY DETECTOR FOR PROVIDING AN OUTPUT VOLTAGE VARYING WITH THE FREQUENCY OF THE SIGNAL OF THE RESPECTIVE FORMANT REGION, SAID RECEIVER COMPRISING MEANS FOR RECEIVING THE SIGNAL OUTPUT OF SAID ONE CHANNEL AND SAID OUTPUT VOLTAGE OF THE REMAINDER OF SAID CHANNELS, SAID BAND EXPANSION DEVICE COMPRISING MEANS FOR PASSING SIGNALS WITHOUT EXPANSION, MEANS FOR SHIFTING THE SIGNAL OUTPUT OF SAID ONE CHANNEL WITHIN THE FREQUENCY BAND OF SAID ONE CHANNEL TO THE FREQUENCY BAND OF EACH OF THE OTHER FORMANT REGIONS AND FOR VARYING THE FREQUENCY OF THE SHIFTED SIGNALS IN EACH OF THE OTHER FORMANT REGION BANDS IN RESPONSE TO THE OUTPUT VOLTAGE OF THE CHANNEL CORRESPONDING TO THE RESPECTIVE FORMANT REGION, AND MEANS FOR COMBINING THE SIGNALS PASSED WITHOUT EXPANSION WITHIN THE FREQUENCY BAND OF SAID ONE CHANNEL AND THE OUTPUT SIGNALS OF SAID SHIFTING AND FREQUENCY VARYING MEANS.
Claim 2
Dependent Claim
200 words
A TRANSMISSION SYSTEM FOR SPEECH SIGNALS COMPRISING A TRANSMITTER HAVING A BAND COMPRESSION DEVICE, AND A RECEIVER HAVING A BAND EXPANSION DEVICE; SAID BAND COMPRESSION DEVICE COMPRISING A PLURALITY OF CHANNELS, MEANS APPLYING SIGNALS OF DIFFERENT FORMANT REGIONS TO SAID CHANNELS, ONE OF SAID CHANNELS PASSING SIGNALS WITHOUT COMPRESSION, THE REMAINDER OF SAID CHANNELS EACH COMPRISING A FORMANT FREQUENCY DETECTOR FOR PROVIDING AN OUTPUT VOLTAGE VARYING WITH THE FREQUENCY OF THE SIGNAL OF THE RESPECTIVE FORMANT REGION, SAID RECEIVER COMPRISING MEANS FOR RECEIVING THE SIGNAL OUTPUT OF SAID ONE CHANNEL AND SAID OUTPUT VOLTAGE OF THE REMAINDER OF SAID CHANNELS, SAID BAND EXPANSION DEVICE COMPRISING MEANS FOR PASSING SIGNALS WITHOUT EXPANSION, MEANS FOR SHIFTING THE SIGNAL OUTPUT OF SAID ONE CHANNEL WITHIN THE FREQUENCY BAND OF SAID ONE CHANNEL TO THE FREQUENCY BAND OF EACH OF THE OTHER FORMANT REGIONS AND FOR VARYING THE FREQUENCY OF THE SHIFTED SIGNALS IN EACH OF THE OTHER FORMANT REGION BANDS IN RESPONSE TO THE OUTPUT VOLTAGE OF THE CHANNEL CORRESPONDING TO THE RESPECTIVE FORMANT REGION, AND MEANS FOR COMBINING THE SIGNALS PASSED WITHOUT EXPANSION WITHIN THE FREQUENCY BAND OF SAID ONE CHANNEL AND THE OUTPUT SIGNALS OF SAID SHIFTING AND FREQUENCY VARYING 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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |