US3072755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone headphone attachment
Assignee: Canadian Res & Dev Foundation
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Filing: 1961-07-27
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Granted: 1963-01-08
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Expires: 1981-07-27
Abstract
No abstract record available.
Inventors
- 👤 Olaf E O Kuhberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:41
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/04; H04M1/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A TELEPHONE HEADPHONE ASSEMBLY ADAPTED FOR ATTACHMENT TO A TELEPHONE HANDSET; A TELEPHONE HANDSET HAVING A LINE CORD CONTAINING AN EARPHONE CIRCUIT, A HEADPHONE ASSEMBLY INCLUDING AUXILIARY EARPHONE MEANS; A RESILIENT FRAMEWORK SUPPORTING SAID AUXILIARY EARPHONES; A FIXED ARM ATTACHED TO SAID HANDSET AND ROTATABLY SUPPORTING SAID FRAMEWORK; CONTACT MEANS OPERABLE BY THE ROTATION OF SAID FRAMEWORK PLACING SAID AUXILIARY EARPHONE IN ELECTRICAL CIRCUIT WITH SAID HANDSET.
Claim 2
Dependent Claim
67 words
A TELEPHONE HEADPHONE ASSEMBLY ADAPTED FOR ATTACHMENT TO A TELEPHONE HANDSET; A TELEPHONE HANDSET HAVING A LINE CORD CONTAINING AN EARPHONE CIRCUIT, A HEADPHONE ASSEMBLY INCLUDING AUXILIARY EARPHONE MEANS; A RESILIENT FRAMEWORK SUPPORTING SAID AUXILIARY EARPHONES; A FIXED ARM ATTACHED TO SAID HANDSET AND ROTATABLY SUPPORTING SAID FRAMEWORK; CONTACT MEANS OPERABLE BY THE ROTATION OF SAID FRAMEWORK PLACING SAID AUXILIARY EARPHONE IN ELECTRICAL CIRCUIT WITH SAID HANDSET.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |