Patent US2717368A successfully refreshed from Google Patents.
US3172102A
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Interrogator-responder signalling system
Assignee: General Precision Inc
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Filing: 1960-10-06
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Granted: 1965-03-02
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Expires: 1980-10-06
Abstract
No abstract record available.
Inventors
- 👤 Norman W Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:28
CPC Classifications
B; B61; B61L; B61L25/00; B61L25/02; B61L25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A SIGNALLING SYSTEM COMPRISING AN INTERROGATOR STATION, AND A RESPONDER DEVICE MOVABLE INTO SPACED RELATION WITH THE INTERROGATOR STATION, SAID INTERROGATION STATION INCLUDING A MEANS FOR GENERATING AN INTERROGATION SIGNAL HAVING A CARRIER FREQUENCY AND A PLURALITY OF SIDEBAND FREQUENCIES, SAID RESPONDER DEVICE INCLUDING A MEANS FOR DETECTING THE INTERROGATION SIGNAL AND FOR DEVELOPING A PLURALITY OF AUDIO SIGNALS CORRESPONDING TO THE SIDEBAND FREQUENCIES, FILTER MEANS FOR SELECTIVELY ATTENUATING AT LEAST ONE OF THE AUDIO SIGNALS AND FOR PASSING AT LEAST ANOTHER AUDIO SIGNAL, AND MEANS COUPLED TO THE FILTER MEANS FOR GENERATING A RESPONSE SIGNAL WITH THE AUDIO
Claim 2
Dependent Claim
99 words
A SIGNALLING SYSTEM COMPRISING AN INTERROGATOR STATION, AND A RESPONDER DEVICE MOVABLE INTO SPACED RELATION WITH THE INTERROGATOR STATION, SAID INTERROGATION STATION INCLUDING A MEANS FOR GENERATING AN INTERROGATION SIGNAL HAVING A CARRIER FREQUENCY AND A PLURALITY OF SIDEBAND FREQUENCIES, SAID RESPONDER DEVICE INCLUDING A MEANS FOR DETECTING THE INTERROGATION SIGNAL AND FOR DEVELOPING A PLURALITY OF AUDIO SIGNALS CORRESPONDING TO THE SIDEBAND FREQUENCIES, FILTER MEANS FOR SELECTIVELY ATTENUATING AT LEAST ONE OF THE AUDIO SIGNALS AND FOR PASSING AT LEAST ANOTHER AUDIO SIGNAL, AND MEANS COUPLED TO THE FILTER MEANS FOR GENERATING A RESPONSE SIGNAL WITH THE AUDIO
References Cited (Backward Citations)
US2480160A
Cited
US2535162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |