US3465294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural channel frequency detecting circuit
Assignee: Motorola Solutions Inc
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Filing: 1966-03-07
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Granted: 1969-09-02
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Expires: 1986-03-07
Abstract
No abstract record available.
Inventors
- 👤 Richard D Carsello
- 👤 Richard E Lunquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:20
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; H04W88/025; H04W88/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A TONE DECODER INCLUDING IN COMBINATION; FIRST TONE CHANNEL MEANS INCLUDING FIRST FREQUENCY SELECTIVE MEANS FOR RECEIVING AND TRNSLATING A FIRST TONE SIGNAL OF PREDETERMINED FREQUENCY, SAID FIRST TONE CHANNEL MEANS BEING RESPONSIVE TO SAID FIRST TONE SIGNAL TO DEVELOP A CONTROL SIGNAL A PREDETERMINED TIME AFTER THE TERMINATION OF SAID FIRST TONE SIGNAL, SAID CONTROL SIGNAL HAVING A PARTICULAR TIME DURATION, SECOND TONE CHANNEL MEANS INCLUDING SECOND FREQUENCY SELECTIVE MEANS FOR RECEIVING A SECOND TONE SIGNAL OF PREDETERMINED FREQUENCY, ALERTING MEANS COUPLED TO SAID SECOND TONE CHANNEL MEANS AND ADAPTED TO BE ENERGIZED BY SAID SECOND TONE SIGNAL, INHIBITING MEANS COUPLED BETWEEN SAID FIRST AND SECOND TONE CHANNEL MEANS AND BEING NORMALLY OPERATIVE TO PREVENT SAID SECOND TONE SIGNAL FROM ENERGIZING SAID ALERTING MEANS, SAID INHIBITING MEANS BEING RESPONSIVE TO SAID CONTROL SIGNAL TO BECOME DISABLED WHEREBY SAID SECOND TONE SIGNAL RECEIVED DURING SAID PARTICULAR TIME DURATION ENERGIZES SAID ALERTING MEANS.
Claim 2
Dependent Claim
152 words
A TONE DECODER INCLUDING IN COMBINATION; FIRST TONE CHANNEL MEANS INCLUDING FIRST FREQUENCY SELECTIVE MEANS FOR RECEIVING AND TRNSLATING A FIRST TONE SIGNAL OF PREDETERMINED FREQUENCY, SAID FIRST TONE CHANNEL MEANS BEING RESPONSIVE TO SAID FIRST TONE SIGNAL TO DEVELOP A CONTROL SIGNAL A PREDETERMINED TIME AFTER THE TERMINATION OF SAID FIRST TONE SIGNAL, SAID CONTROL SIGNAL HAVING A PARTICULAR TIME DURATION, SECOND TONE CHANNEL MEANS INCLUDING SECOND FREQUENCY SELECTIVE MEANS FOR RECEIVING A SECOND TONE SIGNAL OF PREDETERMINED FREQUENCY, ALERTING MEANS COUPLED TO SAID SECOND TONE CHANNEL MEANS AND ADAPTED TO BE ENERGIZED BY SAID SECOND TONE SIGNAL, INHIBITING MEANS COUPLED BETWEEN SAID FIRST AND SECOND TONE CHANNEL MEANS AND BEING NORMALLY OPERATIVE TO PREVENT SAID SECOND TONE SIGNAL FROM ENERGIZING SAID ALERTING MEANS, SAID INHIBITING MEANS BEING RESPONSIVE TO SAID CONTROL SIGNAL TO BECOME DISABLED WHEREBY SAID SECOND TONE SIGNAL RECEIVED DURING SAID PARTICULAR TIME DURATION ENERGIZES SAID ALERTING MEANS.
References Cited (Backward Citations)
US3387212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |