US3588828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling system responsive to pulses within an amplitude range
Assignee: Individual
•
Filing: 1967-08-02
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Granted: 1971-06-28
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Expires: 1987-08-02
Abstract
Abstract AN ELECTRICAL SIGNALING SYSGEM INCLUDING PLURAL TRANSMITTERS, PLURAL REMOTE RECEIVERS EACH ASSOCIATED WITH A DIFFERENT ONE OF THE TRANSMITTERS, AND A PAIR OF CONDUCTORS INTERCONNECTING ALL OF THE TRANSMITTERS AND RECEIVERS FOR TRANSMITTING SIGNALS THEREBETWEEN. THE TRANSMITTERS ARE OPERABLE TO PRODUCE RECURRENT PULSES WITH THE PULSES OF DIFFERENT TRANSMITTERS HAVING DIFFERNT PULSE HEIGHTS. EACH RECEIVER INCLUDES PULSE HEIGHT SENSITIVE CIRCUITRY WHICH IS RESPONSIVE ONLY TO THE PULSES PRODUCED BY THE RECEIVER''S ASSOCIATED TRANSMITTER.
Inventors
- 👤 Joseph Schulein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:33
CPC Classifications
G; G08; G08B; G08B25/00; G08B25/01; G08B25/018
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |