US3592978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereo earphones
Assignee: Individual
•
Filing: 1969-04-21
•
Granted: 1971-07-13
•
Expires: 1989-04-21
Abstract
Abstract Stereo earphones having transducers positioned forwardly of the user''s ears and directed rearwardly toward the ears to provide more realistic stereophonic sound effects.
Inventors
- 👤 David H Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:56
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/10; H04R1/1058; H04R1/1075; H04R1/1008; H04R5/00; H04R5/033; H04R5/0335
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
44 words
Improvements in stereo earphones which comprise; an earphone; means for positioning the earphone to extend forwardly of the ear of the user; and a transducer mounted in the forward portion of said earphone and facing rearwardly and angularly toward the ear of the user.
Claim 2
Dependent Claim
44 words
Improvements in stereo earphones which comprise; an earphone; means for positioning the earphone to extend forwardly of the ear of the user; and a transducer mounted in the forward portion of said earphone and facing rearwardly and angularly toward the ear of the user.
Claim 3
Dependent Claim
28 words
The device of claim 1 additionally including an earcup and wherein the earphone includes a sound conducting housing extending rearwardly and angularly from the transducer to the earcup.
Claim 4
Dependent Claim
12 words
The device of claim 1 where the positioning means is a headband.
Claim 5
Dependent Claim
12 words
The device of claim 2 wherein the positioning means is a headband.
Claim 6
Dependent Claim
11 words
The device of claim 1 embodied in a pair of earphones.
Claim 7
Dependent Claim
11 words
The device of claim 2 embodied in a pair of earphones.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |