US3210475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct station selection circuit
Assignee: AT&T Inc
•
Filing: 1961-06-08
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Granted: 1965-10-05
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Expires: 1981-06-08
Abstract
No abstract record available.
Inventors
- 👤 Breen Charles
- 👤 Henry J Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:07
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN AN AUTOMATIC TELEPHONE SYSTEM, A REGISTER HAVING FIRST AND SECOND INPUTS RESPONSIVE TO DIFFERENT TYPE SIGNAL INPUTS RESPECTIVELY, A SUBSCRIBER STATION HAVING DIRECT STATION SELECTION MEANS AND HAVING A STATION LINE EXTENDABLE TO SAID FIRST INPUT, DATA REPRESENTATIVE MEANS INDICATIVE OF A DIRECTLY SELECTED STATION EXTENDABLE TO SAID SECOND INPUT, MEANS AT SAID FIRST INPUT OPERATIVE UPON THE OPERATION OF SAID DIRECT SELECTION MEANS WHEN SAID LINE IS EXTENDED THERETO TO PLACE A SPECIAL SIGNAL ON SAID LINE, AND CONNECTING MEANS OPERATIVE IN RESPONSE TO SAID SPECIAL
Claim 2
Dependent Claim
88 words
IN AN AUTOMATIC TELEPHONE SYSTEM, A REGISTER HAVING FIRST AND SECOND INPUTS RESPONSIVE TO DIFFERENT TYPE SIGNAL INPUTS RESPECTIVELY, A SUBSCRIBER STATION HAVING DIRECT STATION SELECTION MEANS AND HAVING A STATION LINE EXTENDABLE TO SAID FIRST INPUT, DATA REPRESENTATIVE MEANS INDICATIVE OF A DIRECTLY SELECTED STATION EXTENDABLE TO SAID SECOND INPUT, MEANS AT SAID FIRST INPUT OPERATIVE UPON THE OPERATION OF SAID DIRECT SELECTION MEANS WHEN SAID LINE IS EXTENDED THERETO TO PLACE A SPECIAL SIGNAL ON SAID LINE, AND CONNECTING MEANS OPERATIVE IN RESPONSE TO SAID SPECIAL
References Cited (Backward Citations)
US2283395A
Cited
US2651680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |