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Patent US3136949A successfully refreshed from Google Patents.
US3136949A
Expired / Lapsed
US
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Speech modulation system utilizing two spaced frequencies
Assignee: Motorola Solutions Inc
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Filing: 1960-10-20
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Granted: 1964-06-09
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Expires: 1980-10-20
Abstract
No abstract record available.
Inventors
- 👤 William L Firestone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:03
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/24; H03C3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A SIGNALING SYSTEM THE COMBINATION INCLUDING, A SOURCE OF SPEECH SIGNALS, SPEECH SIGNAL TRANSLATING MEANS INCLUDING DIFFERENTIATING MEANS COUPLED TO SAID SPEECH SIGNAL SOURCE FOR PRODUCING FIRST AND SECOND MODULATING SIGNALS FROM SAID INTELLIGENCE, OSCILLATOR CIRCUIT MEANS ADAPTED TO PRODUCE FIRST AND SECOND FREQUENCIES AT A COMMON OUTPUT POINT THEREOF, CONTROL CIRCUIT MEANS COUPLING SAID TRANSLATING MEANS TO SAID OSCILLATOR CIRCUIT MEANS SO THAT SAID FIRST AND SECOND FREQUENCIES ARE RESPECTIVELY CONTROLLED IN ACCORDANCE WITH SAID FIRST AND SECOND MODULATING SIGNALS, AND OUTPUT CIRCUIT MEANS COUPLED TO THE COMMON OUTPUT OF SAID OSCILLATOR CIRCUIT MEANS FOR TRANSMITTING THE RESULTANT SIGNAL INCLUDING SAID FIRST AND SECOND FREQUENCIES.
Claim 2
Dependent Claim
107 words
IN A SIGNALING SYSTEM THE COMBINATION INCLUDING, A SOURCE OF SPEECH SIGNALS, SPEECH SIGNAL TRANSLATING MEANS INCLUDING DIFFERENTIATING MEANS COUPLED TO SAID SPEECH SIGNAL SOURCE FOR PRODUCING FIRST AND SECOND MODULATING SIGNALS FROM SAID INTELLIGENCE, OSCILLATOR CIRCUIT MEANS ADAPTED TO PRODUCE FIRST AND SECOND FREQUENCIES AT A COMMON OUTPUT POINT THEREOF, CONTROL CIRCUIT MEANS COUPLING SAID TRANSLATING MEANS TO SAID OSCILLATOR CIRCUIT MEANS SO THAT SAID FIRST AND SECOND FREQUENCIES ARE RESPECTIVELY CONTROLLED IN ACCORDANCE WITH SAID FIRST AND SECOND MODULATING SIGNALS, AND OUTPUT CIRCUIT MEANS COUPLED TO THE COMMON OUTPUT OF SAID OSCILLATOR CIRCUIT MEANS FOR TRANSMITTING THE RESULTANT SIGNAL INCLUDING SAID FIRST AND SECOND FREQUENCIES.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |