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US3566270A
Expired / Lapsed
US
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Program-signal broadcast system transmissible of a control signal by the use of intermittent transmitter control for frequency filtering
Assignee: Individual
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Filing: 1968-01-04
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Granted: 1971-02-23
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Expires: 1988-01-04
Abstract
Abstract A SYSTEM FOR CONTROLLING, FROM THE SENDING SIDE, THE RECEIVING SIDE IN A BROADCAST SYSTEM USING A CONTROL SIGNAL, WHERE A FALSE SIGNAL SIMILAR, WITH RESPECT TO FREQUENCY AND SIGNAL-CONFIGURATION, TO THE REGULAR CONTROL SIGNAL IS DETECTED FROM THE BROADCAST SIGNALS BEFORE THE RECEIVING SIDE IS SPURIOUSLY TRIGGERED BY THE FALSE SIGNALS AND ELMINATION FILTER OR FILTERS IS/ARE INSERTED IN THE PATH OF THE BROADCAST SIGNALS DURING ONLY A PREDETERMINED TIME TO ELIMINATE THE SAME FREQUENCY COMPONENTS AS THE CONTROL SIGNAL, WHEREBY THE CONTROL SIGNAL CAN BE TRANSMITTED WITH NO CHANCE OF SPURIOUS TRIGGERING.
Inventors
- 👤 Masayuki Fukata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:11
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/28; H04H20/30; H04H20/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |