US3234337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aid for blind switchboard attendant
Assignee: AT&T Inc
•
Filing: 1962-07-20
•
Granted: 1966-02-08
•
Expires: 1982-07-20
Abstract
No abstract record available.
Inventors
- 👤 Robert F Schuyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:47
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A MANUAL TELEPHONE SWITCHBOARD INTENDED TO BE SUPERVISED BY A BLIND ATTENDANT, A PLURALITY OF LINES TERMINATING AT SAID SWITCHBOARD ARRANGED IN A MULTIPLICITY OF ROWS, AN EQUAL MULTIPLICITY OF AUDIO GENERATORS FOR GENERATING DISTINCTLY DIFFERNT TONES, EACH TONE CORRESPONDING TO A DIFFERENT ROW ON SAID SWITCHBOARD, SAID GENERATORS BEING RESPONSIVE TO INCOMING CALLS ON SAID LINES AND GENERATING TONES INDICATIVE OF THE ROWS IN WHICH THE CALLING LINES ARE LOCATED, AND MEANS FOR COUPLING SAID TONES TO A HEADSET USED BY SAID ATTENDANT.
Claim 2
Dependent Claim
85 words
IN A MANUAL TELEPHONE SWITCHBOARD INTENDED TO BE SUPERVISED BY A BLIND ATTENDANT, A PLURALITY OF LINES TERMINATING AT SAID SWITCHBOARD ARRANGED IN A MULTIPLICITY OF ROWS, AN EQUAL MULTIPLICITY OF AUDIO GENERATORS FOR GENERATING DISTINCTLY DIFFERNT TONES, EACH TONE CORRESPONDING TO A DIFFERENT ROW ON SAID SWITCHBOARD, SAID GENERATORS BEING RESPONSIVE TO INCOMING CALLS ON SAID LINES AND GENERATING TONES INDICATIVE OF THE ROWS IN WHICH THE CALLING LINES ARE LOCATED, AND MEANS FOR COUPLING SAID TONES TO A HEADSET USED BY SAID ATTENDANT.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |