Patent US3349181A successfully refreshed from Google Patents.
US3349181A
Expired / Lapsed
US
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Phase shift modulation radio communication system
Assignee: NEC Corp
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Filing: 1964-05-08
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Granted: 1967-10-24
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Expires: 1984-05-08
Abstract
No abstract record available.
Inventors
- 👤 Ito Sukehiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:53
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/20; H04L27/2032; H04L27/2035; H04J; H04J3/00; H04L27/22; H04L27/233; H04L27/2332; H04L5/00; H04L5/02; H04L5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A PHASE SHIFT MODULATION RADIO COMMUNICATION TRANSMITTER COMPRISING: A SOURCE OF INFORMATION SIGNALS; TRANSMITTER MEANS CONNECTED TO SAID INFORMATION SIGNAL SOURCE, SAID TRANSMITTER MEANS INCLUDING: CODING MEANS FOR CONVERTING SAID SIGNALS INTO A MULTI-ELEMENT CODE COMPRISING A PRESELECTED NUMBER OF DISCRETE VOLTAGES OF PREDETERMINED VALUES, EACH VOLTAGE VALUE CONSITUTING ONE CODE ELEMENT; MEANS FOR CONVERTING SAID VOLTAGE CODE INTO A PHASE SHIFT FURTHER SIGNAL REPRESENTED BY A PLURALITY OF PHASE VECTORS HAVING A NUMBER EQUAL TO SAID PRESELECTED NUMBER OF VOLTAGE CODE ELEMENTS AND OCCUPYING ANGULAR POSITIONS BETWEEN PREDETERMINED RECTILINEAL COORDINATE AXES, EACH FURTHER SIGNAL PHASE VECTOR OCCUPYING AN ANGULAR POSITION BETWEEN A PREDETERMINED TWO OF SAID COORDINATE AXES FOR REPRESENTING ONE VOLTAGE CODE ELEMENT; AND MEANS FOR TRANSMITTING A CARRIER SIGNAL VARYING A PRESELECTED CHARACTERISTIC IN A PLURALITY OF PREDETERMINED AMOUNTS IN RESPONSE TO SAID FURTHER SIGNAL REPRESENTED BY SAID PHASE VECTORS, SAID CARRIER SIGNAL VARYING SAID PRESELECTED CHARACTERISTIC IN EACH PREDETERMINED AMOUNT IN RESPONSE TO SAID FURTHER SIGNAL REPRESENTED BY EACH OF SAID PHASE VECTORS IN TURN FOR REPRESENTATING EACH OF SAID VOLTAGE CODE ELEMENTS IN TURN.
Claim 2
Dependent Claim
179 words
A PHASE SHIFT MODULATION RADIO COMMUNICATION TRANSMITTER COMPRISING: A SOURCE OF INFORMATION SIGNALS; TRANSMITTER MEANS CONNECTED TO SAID INFORMATION SIGNAL SOURCE, SAID TRANSMITTER MEANS INCLUDING: CODING MEANS FOR CONVERTING SAID SIGNALS INTO A MULTI-ELEMENT CODE COMPRISING A PRESELECTED NUMBER OF DISCRETE VOLTAGES OF PREDETERMINED VALUES, EACH VOLTAGE VALUE CONSITUTING ONE CODE ELEMENT; MEANS FOR CONVERTING SAID VOLTAGE CODE INTO A PHASE SHIFT FURTHER SIGNAL REPRESENTED BY A PLURALITY OF PHASE VECTORS HAVING A NUMBER EQUAL TO SAID PRESELECTED NUMBER OF VOLTAGE CODE ELEMENTS AND OCCUPYING ANGULAR POSITIONS BETWEEN PREDETERMINED RECTILINEAL COORDINATE AXES, EACH FURTHER SIGNAL PHASE VECTOR OCCUPYING AN ANGULAR POSITION BETWEEN A PREDETERMINED TWO OF SAID COORDINATE AXES FOR REPRESENTING ONE VOLTAGE CODE ELEMENT; AND MEANS FOR TRANSMITTING A CARRIER SIGNAL VARYING A PRESELECTED CHARACTERISTIC IN A PLURALITY OF PREDETERMINED AMOUNTS IN RESPONSE TO SAID FURTHER SIGNAL REPRESENTED BY SAID PHASE VECTORS, SAID CARRIER SIGNAL VARYING SAID PRESELECTED CHARACTERISTIC IN EACH PREDETERMINED AMOUNT IN RESPONSE TO SAID FURTHER SIGNAL REPRESENTED BY EACH OF SAID PHASE VECTORS IN TURN FOR REPRESENTATING EACH OF SAID VOLTAGE CODE ELEMENTS IN TURN.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |