Patent US3356797A successfully refreshed from Google Patents.
US3356797A
Expired / Lapsed
US
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Earphone construction
Assignee: EUGEN BEYER ELECTROTECHNISCHE FABRIK
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Filing: 1964-09-08
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Granted: 1967-12-05
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Konzelmann Kurt
- 👤 Doege Ernst
- 👤 Wischgoll Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:02
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/10; H04R1/1058; H04R1/1066; H04R1/1008; H04R2201/00; H04R2201/10; H04R2201/107; H04R5/00; H04R5/033; H04R5/0335
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
HEADPHONE APPARATUS, COMPRISING A HEADPHONE EARPIECE INCLUDING A PAIR OF ELECTRICAL TERMINALS; HARNESS MEANS ADAPTED TO MOUNT SAID EARPIECE ON THE HEAD OF A USER, SAID HARNESS MEANS INCLUDING A PAIR OF ELECTRICALLY-CONDUCTIVE MUTUALLY-INSULATED PARALLEL BARE SLIDE RODS UPON WHICH SAID EARPIECE IS SLIDABLY MOUNTED; CABLE MEANS INCLUDING A PAIR OF ELECTRICAL CONDUCTORS; AND CIRCUIT MEANS INCLUDING AT LEAST PORTIONS OF THE LENGTHS OF SAID CONDUCTIVE ELEMENTS FOR ELECTRICALLY CONNECTING SAID CONDUCTORS WITH SAID EARPIECE TERMINALS, RESPECTIVELY.
Claim 2
Dependent Claim
77 words
HEADPHONE APPARATUS, COMPRISING A HEADPHONE EARPIECE INCLUDING A PAIR OF ELECTRICAL TERMINALS; HARNESS MEANS ADAPTED TO MOUNT SAID EARPIECE ON THE HEAD OF A USER, SAID HARNESS MEANS INCLUDING A PAIR OF ELECTRICALLY-CONDUCTIVE MUTUALLY-INSULATED PARALLEL BARE SLIDE RODS UPON WHICH SAID EARPIECE IS SLIDABLY MOUNTED; CABLE MEANS INCLUDING A PAIR OF ELECTRICAL CONDUCTORS; AND CIRCUIT MEANS INCLUDING AT LEAST PORTIONS OF THE LENGTHS OF SAID CONDUCTIVE ELEMENTS FOR ELECTRICALLY CONNECTING SAID CONDUCTORS WITH SAID EARPIECE TERMINALS, RESPECTIVELY.
References Cited (Backward Citations)
US3311713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |