Patent US3138665A successfully refreshed from Google Patents.
US3138665A
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Phase position modulator
Assignee: AT&T Inc
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Filing: 1961-08-10
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Granted: 1964-06-23
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Expires: 1981-08-10
Abstract
No abstract record available.
Inventors
- 👤 Norman E Chasek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:16
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/22; H04L27/227; H04L27/2271; H04L27/2272; H03; H03D; H03D1/00; H03D1/22; H03D1/24; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/58; H03K7/00; H04B; H04B1/00; H04B1/68; H04L27/20; H04L27/2032; H04L27/2035; H04L27/2275
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A MODULATOR FOR CONVERTING PULSE ENCODED INFORMATION INTO PHASE POSITION ENCODED INFORMATION COMPRISING A NEGATIVE RESISTANCE ELEMENT AND A POSITIVE RESISTANCE ELEMENT CONNECTED IN SERIES ACROSS THE TERMINALS OF A SOURCE OF A RADIO-FREQUENCY CARRIER, AND MEANS RESPONSIVE TO A GIVEN CODE CHARACTER OF SAID PULSE CODE INFORMATION CONNECTED ACROSS ONE OF SAID RESISTANCE ELEMENTS FOR SELECTIVELY ALTERING THE RESISTANCE THEREOF SUCH THAT THE PHASE OF SAID CARRIER IS SHIFTED FROM ONE PREDETERMINED PHASE CONDITION TO A SECOND PREDETERMINED PHASE CONDITION.
Claim 2
Dependent Claim
81 words
A MODULATOR FOR CONVERTING PULSE ENCODED INFORMATION INTO PHASE POSITION ENCODED INFORMATION COMPRISING A NEGATIVE RESISTANCE ELEMENT AND A POSITIVE RESISTANCE ELEMENT CONNECTED IN SERIES ACROSS THE TERMINALS OF A SOURCE OF A RADIO-FREQUENCY CARRIER, AND MEANS RESPONSIVE TO A GIVEN CODE CHARACTER OF SAID PULSE CODE INFORMATION CONNECTED ACROSS ONE OF SAID RESISTANCE ELEMENTS FOR SELECTIVELY ALTERING THE RESISTANCE THEREOF SUCH THAT THE PHASE OF SAID CARRIER IS SHIFTED FROM ONE PREDETERMINED PHASE CONDITION TO A SECOND PREDETERMINED PHASE CONDITION.
References Cited (Backward Citations)
US2712637A
Cited
US2994063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |