Patent US3075147A successfully refreshed from Google Patents.
US3075147A
Expired / Lapsed
US
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Pulse code modulation transmission
Assignee: AT&T Inc
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Filing: 1946-03-22
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Granted: 1963-01-22
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Expires: 1966-03-22
Abstract
No abstract record available.
Inventors
- 👤 Frederick B Llewellyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:45
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/04; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/28; H03M1/287; H03M13/00; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A COMMUNICATION SYSTEM FOR TRANSMITTING A MESSAGE WAVE, MEANS FOR SAMPLING THE AMPLITUDE OF SAID WAVE AT RECURRENT INTERVALS, A CATHODE-RAY TUBE, MEANS FOR DEFLECTING THE ELECTRON BEAM THEREOF IN ONE DIRECTION UNDER CONTROL OF THE AMPLITUDE OF THE WAVE SAMPLES, MEANS TRIGGERED WITH THE TAKING OF A SAMPLE TO SWEEP THE ELECTRON BEAM IN A DIRECTION NORMAL TO THE SAMPLE AMPLITUDE DEFLECTION, AND A CODING ELEMENT ARRANGED TO COOPERATE WITH SAID BEAM TO PRODUCE AS A RESULT OF EACH SWEEP A GROUP
Claim 2
Dependent Claim
84 words
IN A COMMUNICATION SYSTEM FOR TRANSMITTING A MESSAGE WAVE, MEANS FOR SAMPLING THE AMPLITUDE OF SAID WAVE AT RECURRENT INTERVALS, A CATHODE-RAY TUBE, MEANS FOR DEFLECTING THE ELECTRON BEAM THEREOF IN ONE DIRECTION UNDER CONTROL OF THE AMPLITUDE OF THE WAVE SAMPLES, MEANS TRIGGERED WITH THE TAKING OF A SAMPLE TO SWEEP THE ELECTRON BEAM IN A DIRECTION NORMAL TO THE SAMPLE AMPLITUDE DEFLECTION, AND A CODING ELEMENT ARRANGED TO COOPERATE WITH SAID BEAM TO PRODUCE AS A RESULT OF EACH SWEEP A GROUP
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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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |