US3281693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voice frequency receiver for detecting out-of-band tone signals
Assignee: Nokia Bell Labs
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Filing: 1962-12-28
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Granted: 1966-10-25
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Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 Herbert M Zydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:46
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/442; H04Q1/4423; H04M; H04M11/00; H04M11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A DATA SET FOR TRANSMITTING AND RECEIVING VOICE FREQUENCY DATA SIGNALS, A SOURCE OF DATA SIGNALS, AN OSCILLATOR FOR TRANSMITTING SIGNAL FREQUENCIES IN A VOICE FREQUENCY BAND IN ACCORDANCE WITH DATA SIGNALS FROM SAID SOURCE, DETECTING MEANS FOR CONVERTING RECEIVED SIGNAL FREQUENCIES IN A VOICE FREQUENCY BAND TO DATA SIGNALS, MEANS RESPONSIVE TO SAID OSCILLATOR FOR SHIFTING THE FREQUENCY OF SAID RECEIVED VOICE FREQUENCY BAND SIGNALS, OPERABLE MEANS FOR RENDERING SAID DETECTING MEANS RESPONSIVE TO SAID SHIFTING MEANS, AND MEANS FOR OPERATING SAID OPERABLE MEANS AND CONCURRENTLY SHIFTING SAID OSCILLATOR SIGNAL FREQUENCY.
Claim 2
Dependent Claim
93 words
IN A DATA SET FOR TRANSMITTING AND RECEIVING VOICE FREQUENCY DATA SIGNALS, A SOURCE OF DATA SIGNALS, AN OSCILLATOR FOR TRANSMITTING SIGNAL FREQUENCIES IN A VOICE FREQUENCY BAND IN ACCORDANCE WITH DATA SIGNALS FROM SAID SOURCE, DETECTING MEANS FOR CONVERTING RECEIVED SIGNAL FREQUENCIES IN A VOICE FREQUENCY BAND TO DATA SIGNALS, MEANS RESPONSIVE TO SAID OSCILLATOR FOR SHIFTING THE FREQUENCY OF SAID RECEIVED VOICE FREQUENCY BAND SIGNALS, OPERABLE MEANS FOR RENDERING SAID DETECTING MEANS RESPONSIVE TO SAID SHIFTING MEANS, AND MEANS FOR OPERATING SAID OPERABLE MEANS AND CONCURRENTLY SHIFTING SAID OSCILLATOR SIGNAL FREQUENCY.
References Cited (Backward Citations)
US2125953A
Cited
USRE23271E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |