US3317670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver for detecting supervisory tones superimposed on fsk binary data signals
Assignee: AT&T Inc
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Filing: 1963-05-28
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Granted: 1967-05-02
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Expires: 1983-05-28
Abstract
No abstract record available.
Inventors
- 👤 Theodore L Doktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:22
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A DETECTOR FOR FLUCTUATING SUPERVISORY SIGNALS SUPERIMPOSED ON DATA SIGNALS WHICH ALTERNATE ABOUT AN AMPLITUDE LEVEL COMPRISING, VOLTAGE DETECTOR MEANS CAPACITIVELY COUPLED TO INCOMING DATA SIGNALS AND SUPERIMPOSED SUPERVISORY SIGNALS AND RESPONSIVE TO ALL FLUCTUATIONS OF THE AMPLITUDE OF SAID DATA SIGNALS AND SUPERIMPOSED SUPERVISORY SIGNALS, THRESHOLD DETECTOR MEANS RESPONSIVE TO EACH OF THE TRANSITIONS OF SAID DATA SIGNALS THROUGH SAID AMPLITUDE LEVEL, AND MEANS FOR CANCELLING THE OUTPUT OF
Claim 2
Dependent Claim
70 words
A DETECTOR FOR FLUCTUATING SUPERVISORY SIGNALS SUPERIMPOSED ON DATA SIGNALS WHICH ALTERNATE ABOUT AN AMPLITUDE LEVEL COMPRISING, VOLTAGE DETECTOR MEANS CAPACITIVELY COUPLED TO INCOMING DATA SIGNALS AND SUPERIMPOSED SUPERVISORY SIGNALS AND RESPONSIVE TO ALL FLUCTUATIONS OF THE AMPLITUDE OF SAID DATA SIGNALS AND SUPERIMPOSED SUPERVISORY SIGNALS, THRESHOLD DETECTOR MEANS RESPONSIVE TO EACH OF THE TRANSITIONS OF SAID DATA SIGNALS THROUGH SAID AMPLITUDE LEVEL, AND MEANS FOR CANCELLING THE OUTPUT OF
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |