US3560939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital channel selection apparatus
Assignee: KOZPONTI FIZIKAI KUTATO INTEZET
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Filing: 1968-07-05
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Granted: 1971-02-02
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Expires: 1988-07-05
Abstract
Abstract A SELECTION CIRCUIT FOR EXCITING ONE OF M DIGITAL CHANNELS (INCLUDING ONE MONITORING CHANNEL AND M-1 OPERATING CHANNELS) AUTOMATICALLY EXCITES THE MONITORING CHANEL UPON THE DE-EXCITATION OF ANY OF THE OPERATING CHANNELS. EACH SELECTED OPERATING CHANNEL IS ENERGIZED, AND THE MONITORING CHANNEL DEENERGIZED, BY AN ASSOCIATED UNIQUE ONE OF M-1 SWITCHING PULSES. THE DE-EXCITATION OF AN OPERATING CHANNEL AND THE SIMULTANEOUS ENERGYZING OF THE MONITORING CHANNEL IS ACCOMPLISHED BY THE APPLICATION OF A STOP PULSE TO THE LAST-MENTIONED OPERATING CHANNEL.
Inventors
- 👤 Jozsef Lukacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:26
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/30; G06F11/34; G06F11/3466; G06F3/00; G06F3/14; G06F3/153
Claims Analysis
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |