Patent US3174103A successfully refreshed from Google Patents.
US3174103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency beacon transmitter system
Assignee: Douglas Aircraft Co Inc
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Filing: 1962-09-06
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Granted: 1965-03-16
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Expires: 1982-09-06
Abstract
No abstract record available.
Inventors
- 👤 Monroe Harold Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:05
CPC Classifications
H; H04; H04L; H04L15/00; H04L15/04; H04L15/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
A BEACON NETWORK SYSTEM COMPRISING: A MODULATOR OSCILLATOR CIRCUIT INCLUDING A TRANSISTOR OSCILLATOR HAVING AN EFFECTIVE RC COMBINATION COUPLED TO ITS CONTROL ELECTRODE, SAID RC COMBINATION INCLUDING A VARIABLE RESISTANCE CIRCUIT FOR REPETIVELY VARYING THE FREQUENCY OF SAID OSCILLATOR AND COMPRISING A CONTROL OSCILLATOR FOR GENERATING AND PROVIDING AT ITS OUTPUT TERMINAL A SAWTOOTH CONTROL SIGNAL, AND A VARIABLE RESISTANCE TRANSISTOR HAVING ITS CONTROL ELECTRODE COUPLED TO SAID CONTROL OSCILLATOR OUTPUT TERMINAL AND ITS EMITTER AND COLLECTOR CONNECTED IN SAID RC COMBINATION FOR VARYING THE EFFECTIVE MAGNITUDE OF THE RESISTANCE THEREIN RESPONSIVE TO SAID SAWTOOTH CONTROL SIGNAL;
References Cited (Backward Citations)
US3068415A
Cited
US3108223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |