US3223787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone ringing control system
Assignee: Stromberg Carlson Corp
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Filing: 1961-02-20
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Granted: 1965-12-14
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Expires: 1981-02-20
Abstract
No abstract record available.
Inventors
- 👤 Adam A Jorgensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:19
CPC Classifications
H; H04; H04M; H04M19/00; H04M19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
IN COMBINATION, A PLURALITY OF LINE CIRCUITS EACH INCLUDING A LINE, AT LEAST ONE STATION COUPLED TO EACH OF SAID LINES, EACH STATION INCLUDING MEANS CAPABLE OF RETURNING ANSWER SUPERVISION AFTER BEING SIGNALED, A SIGNAL GENERATOR COMMON TO SAID LINE CIRCUITS FOR SELECTIVELY SIGNALING THE STATIONS ON SAID LINES, AN ANSWER SUPERVISION DETECTOR COMMON TO SAID LINE CIRCUITS FOR DETECTING THE RETURN OF ANSWER SUPERVISION FROM SAID STATIONS, SWITCHING MEANS ASSOCIATED WITH EACH LINE CIRCUIT FOR COUPLING AND DECOUPLING SAID SIGNAL GENERATOR AND SAID ANSWER SUPERVISION DETECTOR TO AND FROM THE LINE OF ITS ASSOCIATED LINE CIRCUIT, COMMON CONTROL MEANS FOR CONTROLLING SAID SWITCHING MEANS AND INCLUDING MEANS FOR STORING SIGNALING INFORMATION FOR CONTROLLING WHICH SWITCHING MEANS ARE TO BE ACTUATED TO COUPLE SAID SIGNALING GENERATOR AND SAID ANSWER SUPERVISION DETECTOR TO SAID LINES, SAID COMMON CONTROL MEANS FURTHER INCLUDING MEANS COUPLED BETWEEN SAID MEANS FOR STORING AND SAID SWITCHING MEANS FOR ACTUATING VARIOUS ONES OF SAID SWITCHING MEANS DEPEND-
Claim 2
Dependent Claim
160 words
IN COMBINATION, A PLURALITY OF LINE CIRCUITS EACH INCLUDING A LINE, AT LEAST ONE STATION COUPLED TO EACH OF SAID LINES, EACH STATION INCLUDING MEANS CAPABLE OF RETURNING ANSWER SUPERVISION AFTER BEING SIGNALED, A SIGNAL GENERATOR COMMON TO SAID LINE CIRCUITS FOR SELECTIVELY SIGNALING THE STATIONS ON SAID LINES, AN ANSWER SUPERVISION DETECTOR COMMON TO SAID LINE CIRCUITS FOR DETECTING THE RETURN OF ANSWER SUPERVISION FROM SAID STATIONS, SWITCHING MEANS ASSOCIATED WITH EACH LINE CIRCUIT FOR COUPLING AND DECOUPLING SAID SIGNAL GENERATOR AND SAID ANSWER SUPERVISION DETECTOR TO AND FROM THE LINE OF ITS ASSOCIATED LINE CIRCUIT, COMMON CONTROL MEANS FOR CONTROLLING SAID SWITCHING MEANS AND INCLUDING MEANS FOR STORING SIGNALING INFORMATION FOR CONTROLLING WHICH SWITCHING MEANS ARE TO BE ACTUATED TO COUPLE SAID SIGNALING GENERATOR AND SAID ANSWER SUPERVISION DETECTOR TO SAID LINES, SAID COMMON CONTROL MEANS FURTHER INCLUDING MEANS COUPLED BETWEEN SAID MEANS FOR STORING AND SAID SWITCHING MEANS FOR ACTUATING VARIOUS ONES OF SAID SWITCHING MEANS DEPEND-
References Cited (Backward Citations)
US2617872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |