US3300592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone test circuit
Assignee: Stromberg Carlson Corp
•
Filing: 1963-01-21
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Granted: 1967-01-24
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Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Oliver C Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:38
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/22; H04M3/26; H04M3/28; H04M3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A TELEPHONE SYSTEM FOR TESTING A SUBSCRIBER''S TELEPHONE, THE SUBSCRIBER LOOP AND THE CENTRAL OFFICE SELECTORS, THE COMBINATION COMPRISING MEANS FOR STORING THE PULSE TRAIN CORRESPONDING TO NUMBERS DIALED BY SAID SUBSCRIBER''S TELEPHONE, MEANS FOR READING OUT SAID PULSE TRAIN INTO SAID SELECTORS AFTER SAID TELEPHONE IS DISCONNECTED FROM SAID LOOP, WHEREBY SAID SELECTORS RESPOND TO SAID PULSE TRAIN AND CAUSE RINGING CURRENT TO BE TRANSMITTED TO THE TELEPHONE CORRESPONDING TO THE NUMBER DIALED AND AN ELECTRONIC SECRETARY FOR RECORDING A MESSAGE DICTATED FROM SAID SUBSCRIBER''S TELEPHONE.
Claim 2
Dependent Claim
88 words
IN A TELEPHONE SYSTEM FOR TESTING A SUBSCRIBER''S TELEPHONE, THE SUBSCRIBER LOOP AND THE CENTRAL OFFICE SELECTORS, THE COMBINATION COMPRISING MEANS FOR STORING THE PULSE TRAIN CORRESPONDING TO NUMBERS DIALED BY SAID SUBSCRIBER''S TELEPHONE, MEANS FOR READING OUT SAID PULSE TRAIN INTO SAID SELECTORS AFTER SAID TELEPHONE IS DISCONNECTED FROM SAID LOOP, WHEREBY SAID SELECTORS RESPOND TO SAID PULSE TRAIN AND CAUSE RINGING CURRENT TO BE TRANSMITTED TO THE TELEPHONE CORRESPONDING TO THE NUMBER DIALED AND AN ELECTRONIC SECRETARY FOR RECORDING A MESSAGE DICTATED FROM SAID SUBSCRIBER''S TELEPHONE.
References Cited (Backward Citations)
US3033931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |