US3353102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency shift receiver with noise frequency detection
Assignee: AT&T Inc
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Filing: 1963-12-26
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Granted: 1967-11-14
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Expires: 1983-12-26
Abstract
No abstract record available.
Inventors
- 👤 Stanley T Meyers
- 👤 Jerry P Ratzlaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:08
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14; H04L27/156; H04L27/1563
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A CARRIER FREQUENCY DETECTOR RESPONSIVE TO A FREQUENCY SHIFT SIGNAL IN WHICH FIRST AND SECOND BINARY DATA BIT LEVELS ARE REPRESENTED BY FIRST AND SECOND FREQUENCIES BOUNDING A FIRST CARRIER FREQUENCY BAND WITHIN THE SECOND CARRIER FREQUENCY BAND FOR SUPPRESSING THE EFFECT OF CARRIER SIGNALS HAVING FREQUENCIES THAT ARE BOTH WITHIN SAID SECOND FREQUENCY BAND AND OUTSIDE SAID FIRST FREQUENCY BAND TO PROVIDE AN OUTPUT DATA SIGNAL IN WHICH SAID FIRST AND SECOND BINARY DATA BIT LEVELS ARE REPRESENTED BY FIRST AND SECOND AMPLITUDES RESPECTIVELY COMPRISING: MEANS RESPONSIVE TO SAID FREQUENCY SHIFT SIGNAL FOR PROVIDING A POTENTIAL SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO THE FREQUENCY THEREOF;
Claim 2
Dependent Claim
106 words
A CARRIER FREQUENCY DETECTOR RESPONSIVE TO A FREQUENCY SHIFT SIGNAL IN WHICH FIRST AND SECOND BINARY DATA BIT LEVELS ARE REPRESENTED BY FIRST AND SECOND FREQUENCIES BOUNDING A FIRST CARRIER FREQUENCY BAND WITHIN THE SECOND CARRIER FREQUENCY BAND FOR SUPPRESSING THE EFFECT OF CARRIER SIGNALS HAVING FREQUENCIES THAT ARE BOTH WITHIN SAID SECOND FREQUENCY BAND AND OUTSIDE SAID FIRST FREQUENCY BAND TO PROVIDE AN OUTPUT DATA SIGNAL IN WHICH SAID FIRST AND SECOND BINARY DATA BIT LEVELS ARE REPRESENTED BY FIRST AND SECOND AMPLITUDES RESPECTIVELY COMPRISING: MEANS RESPONSIVE TO SAID FREQUENCY SHIFT SIGNAL FOR PROVIDING A POTENTIAL SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO THE FREQUENCY THEREOF;
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |