US3248486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line switching equipment for switchboards
Assignee: AT&T Inc
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Filing: 1962-12-10
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Granted: 1966-04-26
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Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 Paul W Wadsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:37
CPC Classifications
H; H04; H04Q; H04Q3/00; H04M; H04M3/00; H04M3/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN A SWITCHING SYSTEM, A TRUNK CIRCUIT HAVING A PLURALITY OF COMMUNICATION LINES, OPERATOR POSITION EQUIPMENT INCLUDING MEANS FOR APPLYING CODE SIGNALS TO SAID CIRCUIT, CONTROL MEANS RESPONSIVE TO THE SIGNALS RECEIVED FROM SAID CIRCUIT FOR SUPPLY AN INDIVIDUAL GROUP OF CONTROL SIGNALS THROUGH SAID CIRCUIT TO EACH OF SAID LINES, A PLURALITY OF COMMUNICATION STATIONS, SWITCHING MEANS CONTROLLED BY SAID CONTROL MEANS AND RESPONSIVE TO THE RE-
Claim 2
Dependent Claim
68 words
IN A SWITCHING SYSTEM, A TRUNK CIRCUIT HAVING A PLURALITY OF COMMUNICATION LINES, OPERATOR POSITION EQUIPMENT INCLUDING MEANS FOR APPLYING CODE SIGNALS TO SAID CIRCUIT, CONTROL MEANS RESPONSIVE TO THE SIGNALS RECEIVED FROM SAID CIRCUIT FOR SUPPLY AN INDIVIDUAL GROUP OF CONTROL SIGNALS THROUGH SAID CIRCUIT TO EACH OF SAID LINES, A PLURALITY OF COMMUNICATION STATIONS, SWITCHING MEANS CONTROLLED BY SAID CONTROL MEANS AND RESPONSIVE TO THE RE-
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |