Patent US3447133A successfully refreshed from Google Patents.
US3447133A
Expired / Lapsed
US
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Tone inhibitor circuit for plural tone receiver
Assignee: Motorola Solutions Inc
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Filing: 1966-03-07
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Granted: 1969-05-27
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Expires: 1986-03-07
Abstract
No abstract record available.
Inventors
- 👤 William J Cole
- 👤 Fred J Conforti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:32
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; H04W88/025; H04W88/027; G; G08; G08B; G08B3/00; G08B3/10; G08B3/1008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A TONE DECODER INCLUDING AN COMBINATION: FIRST TONE RECEIVING CHANNEL MEANS INCLUDING FIRST FREQUENCY SELECTIVE MEANS FOR PASSING A FIRST TONE SIGNAL OF A FIRST PREDETERMINED FREQUENCY, SECOND TONE RECEIVING CHANNEL MEANS INCLUDING SECOND FREQUENCY SELECTIVE MEANS FOR PASSING A SECOND TONE SIGNAL OF A SECOND PREDETERMINED FREQUENCY, ALERTING MEANS COUPLED TO SAID SECOND TONE RECEIVING CHANNEL MEANS AND ADAPTED TO BE ENERGIZED BY SAID SECOND TONE SIGNAL, ENABLING MEANS COUPLED BETWEEN SAID FIRST AND SECOND CHANNELS AND ACTING NORMALLY TO DISABLE SAID SECOND TONE RECEIVING CHANNEL MEANS, SAID ENABLING MEANS BEING RESPONSIVE TO SAID FIRST TONE SIGNAL FOR ENABLING SAID SECOND TONE RECEIVING CHANNEL MEANS
Claim 2
Dependent Claim
106 words
A TONE DECODER INCLUDING AN COMBINATION: FIRST TONE RECEIVING CHANNEL MEANS INCLUDING FIRST FREQUENCY SELECTIVE MEANS FOR PASSING A FIRST TONE SIGNAL OF A FIRST PREDETERMINED FREQUENCY, SECOND TONE RECEIVING CHANNEL MEANS INCLUDING SECOND FREQUENCY SELECTIVE MEANS FOR PASSING A SECOND TONE SIGNAL OF A SECOND PREDETERMINED FREQUENCY, ALERTING MEANS COUPLED TO SAID SECOND TONE RECEIVING CHANNEL MEANS AND ADAPTED TO BE ENERGIZED BY SAID SECOND TONE SIGNAL, ENABLING MEANS COUPLED BETWEEN SAID FIRST AND SECOND CHANNELS AND ACTING NORMALLY TO DISABLE SAID SECOND TONE RECEIVING CHANNEL MEANS, SAID ENABLING MEANS BEING RESPONSIVE TO SAID FIRST TONE SIGNAL FOR ENABLING SAID SECOND TONE RECEIVING CHANNEL MEANS
References Cited (Backward Citations)
US3355709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |