Prior art
Abstract
Abstract A COMMUNICATIONS RECEIVER WHICH RECEIVES F.B. COMMUNICATIONS FROM A PLURALITY OF TRANSMITTERS BUT DETECTS INFORMATION ONLY FROM THAT TRANSMITTER WHICH MODULATED THE CARRIER WITH AN ADDRESS FREQUENCY ASSIGNED TO THE RECEIVER. A FREQUENCY DEVIATION FEEDBACK LOOP CONNECTED BETWEEN THE OUTPUT AND INPUT OF THE RECEIVER MIXER GENERATED A LOCAL CARRIER FREQUENCY WHICH DIFFERS FROM THE RECEIVED CARRIERS BY THE CENTER FREQUENCY OF AN IMPROVED DEMODULATUON AND WHICH IS MODULATED BY THE ADDRESS SIGNAL ASSIGNED LOCK LOOP IN THE FEEDBACK PATH OPERATE TO AMPLITUDE LOCK LOOP IN THE FEEDBACK PATH OPERATE TO CONTROL THE PHASE AND AMPLITUDE OF THE LOCALLY GENERATED ADDRESS SIGNAL SO THAT THE MIXING OF THE F.M. MODULATED LOCALLY GENERATED CARRIER AND RECEIVED SIGNALS RESULTS IN AN INTERMEDIATE FREQUENCY OUTPUT WHICH IS FREQUENCY MODUALTED BY THE DESIRED INFORMATION ONLY. ALL OF THE RECEIVED CARRIERS WHICH HAVE BEEN MODUALTED BY DIFFERENT ADDRESS SIGNALS WILL COME OUT OF THE MIXER AS INTERMEDIATE FREQUENCIES MODULATED BY A COMBINATION OF SIGNALS. ONLY THE DESIRED INFORMATION SIGNAL THEN IS CAPABLE OF PASSING THROUGH THE IMPROVED DEMODULATOR.
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Bibliographic Details
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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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |