US4070547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One-point stereo microphone
Assignee: Marantz Co Inc
•
Filing: 1976-01-08
•
Granted: 1978-01-24
•
Expires: 1996-01-08
Abstract
Abstract A stereo microphone having two transducer elements that are mechanically held together, adjacent each other, with one of the elements acting as an electrical transducer for audio signals reaching it from the right, and the other element acting as a similar transducer to convert audio signals reaching it from the left.
Inventors
- 👤 Fred Jay Dellar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:09
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/027
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
128 words
A one-point stereo microphone which includes: a first uni-directional microphone adapted to respond to sounds from a hemisphere; a second uni-directional microphone adapted to respond to sounds from a hemisphere, each of said first and second microphones being capable of and intended for independent normal operation; a housing for each of said first and second microphones, each of said housings being generally elongated with a flat side along the elongated direction and each of said microphones responding to sound from the hemisphere opposite said flat side; and releasable means located on said flat sides of said housings and including a mortise and tenon connection whereby said microphones may be connected together with their flat sides abutting and with said microphones held against rotation with respect to each other.
Claim 2
Dependent Claim
128 words
A one-point stereo microphone which includes: a first uni-directional microphone adapted to respond to sounds from a hemisphere; a second uni-directional microphone adapted to respond to sounds from a hemisphere, each of said first and second microphones being capable of and intended for independent normal operation; a housing for each of said first and second microphones, each of said housings being generally elongated with a flat side along the elongated direction and each of said microphones responding to sound from the hemisphere opposite said flat side; and releasable means located on said flat sides of said housings and including a mortise and tenon connection whereby said microphones may be connected together with their flat sides abutting and with said microphones held against rotation with respect to each other.
Claim 3
Dependent Claim
38 words
A one-point stereo microphone as described in claim 1 in which said housings and said releasable means co-operate to insure that said microphones are both at the same end of said housings when said housings are connected together.
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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |