US3355709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Code receiver responsive to plural tones in sequence
Assignee: Motorola Solutions Inc
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Filing: 1965-01-14
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Granted: 1967-11-28
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Expires: 1985-01-14
Abstract
No abstract record available.
Inventors
- 👤 George M Hanus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:28
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; H04W88/025; H04W88/027; F; F01; F01L; F01L1/00; F01L1/12; F01L1/18; F01L1/181; F01L1/182; F01L1/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A DECODER CIRCUIT FOR RESPONDING TO FIRST AND SECOND TONE SIGNALS OF DIFFERENT FREQUENCIES APPLIED IN SEQUENCE INCLUDING IN COMBINATION, FIRST AND SECOND TONE FREQUENCY SELECTING AND DETECTING CIRCUIT, MEANS FOR APPLYING TONE SIGNALS TO SAID CIRCUITS, SAID FIRST TONE CIRCUIT PROVIDING FIRST AND SECOND OUTPUT SIGNALS IN RESPONSE TO A FIRST TONE SIGNAL SELECTED THEREBY, SAID FIRST AND SECOND OUTPUT SIGNALS CONTINUING AFTER SAID FRST TONE SIGNAL CEASES WITH SAID FIRST OUTPUT SIGNAL CONTINUING FOR A TIME PERIOD AFTER SAID SECOND OUTPUT SIGNAL TERMINATES, SAID SECOND TONE SELECTING AND DETECTING CIRCUIT PROVIDING AN OUTPUT SIGNAL IN RESPONSE TO A SECOND TONE SIGNAL SELECTED THEREBY, SAID
Claim 2
Dependent Claim
106 words
A DECODER CIRCUIT FOR RESPONDING TO FIRST AND SECOND TONE SIGNALS OF DIFFERENT FREQUENCIES APPLIED IN SEQUENCE INCLUDING IN COMBINATION, FIRST AND SECOND TONE FREQUENCY SELECTING AND DETECTING CIRCUIT, MEANS FOR APPLYING TONE SIGNALS TO SAID CIRCUITS, SAID FIRST TONE CIRCUIT PROVIDING FIRST AND SECOND OUTPUT SIGNALS IN RESPONSE TO A FIRST TONE SIGNAL SELECTED THEREBY, SAID FIRST AND SECOND OUTPUT SIGNALS CONTINUING AFTER SAID FRST TONE SIGNAL CEASES WITH SAID FIRST OUTPUT SIGNAL CONTINUING FOR A TIME PERIOD AFTER SAID SECOND OUTPUT SIGNAL TERMINATES, SAID SECOND TONE SELECTING AND DETECTING CIRCUIT PROVIDING AN OUTPUT SIGNAL IN RESPONSE TO A SECOND TONE SIGNAL SELECTED THEREBY, SAID
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |