US3101393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cordless type switchboard
Assignee: AT&T Inc
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Filing: 1961-05-17
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Granted: 1963-08-20
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Expires: 1981-05-17
Abstract
No abstract record available.
Inventors
- 👤 Arnold B Desnoes
- 👤 Dick P Fullerton
- 👤 Philip D Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:31
CPC Classifications
H; H04; H04M; H04M9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM COMPRISING, IN COMBINATION, A CONTROL PANEL, A PLURALITY OF EXTENSION STATIONS, A FIRST BANK OF MANUALLY OPEABLE ILLUMINATABLE KEYS ON SAID CONTROL PANEL EACH CORRESPONDING TO A RESPECTIVE ONE OF A FIRST PLURALITY OF GROUPS OF SAID STATIONS, A SECOND BANK OF MANUALLY OPERABLE ILLUMINATABLE KEYS ON SAID CONTROL PANEL EACH CORRESPONDING TO A RESPECTIVE ONE OF A SECOND PLURALITY OF GROUPS OF SAID STATIONS, EACH OF SAID SECOND GROUPS COMPRISNG A SINGLE RESPECTIVE STATION FROM EACH OF SAID FIRST GROUPS, AND MEANS RESPONSIVE TO THE MEMENTARY OPERATION OF A KEY IN SAID FIRST BANK FOLLOWED BY THE OPERATION OF A KEY IN SAID SECOND BANK FOR COMPLETING A CONNECTION BETWEEN SAID CONTROL PANEL AND A SINGLE RESPECTIVE ONE OF SAID STATIONS.
Claim 2
Dependent Claim
128 words
A PRIVATE BRANCH EXCHANGE TELEPHONE SYSTEM COMPRISING, IN COMBINATION, A CONTROL PANEL, A PLURALITY OF EXTENSION STATIONS, A FIRST BANK OF MANUALLY OPEABLE ILLUMINATABLE KEYS ON SAID CONTROL PANEL EACH CORRESPONDING TO A RESPECTIVE ONE OF A FIRST PLURALITY OF GROUPS OF SAID STATIONS, A SECOND BANK OF MANUALLY OPERABLE ILLUMINATABLE KEYS ON SAID CONTROL PANEL EACH CORRESPONDING TO A RESPECTIVE ONE OF A SECOND PLURALITY OF GROUPS OF SAID STATIONS, EACH OF SAID SECOND GROUPS COMPRISNG A SINGLE RESPECTIVE STATION FROM EACH OF SAID FIRST GROUPS, AND MEANS RESPONSIVE TO THE MEMENTARY OPERATION OF A KEY IN SAID FIRST BANK FOLLOWED BY THE OPERATION OF A KEY IN SAID SECOND BANK FOR COMPLETING A CONNECTION BETWEEN SAID CONTROL PANEL AND A SINGLE RESPECTIVE ONE OF SAID STATIONS.
References Cited (Backward Citations)
US1559251A
Cited
US2993095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |