US3273662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereo sound system
Assignee: —
•
Filing: —
•
Granted: 1966-09-20
•
Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:41
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A STEREO SOUND SYSTEM COMPRISING (A) AN ENCLOSURE WITH AN OPEN SIDE, (B) A PLURALITY OF SPEAKERS MOUNTED IN THE ENCLOSURE AND FACING SAID OPEN SIDE, AND WITH THE SPEAKERS DISPOSED TO FORM AN ARCUATE SURFACE, AND ARRANGED IN VERTICAL ROWS ABOUT A CENTRAL SPEAKER SO THAT AS THE DISTANCE FROM THE CENTRAL SPEAKER INCREASES, THE NUMBER OF SPEAKERS IN EACH VERTICAL ROW INCREASES.
Claim 2
Dependent Claim
64 words
A STEREO SOUND SYSTEM COMPRISING (A) AN ENCLOSURE WITH AN OPEN SIDE, (B) A PLURALITY OF SPEAKERS MOUNTED IN THE ENCLOSURE AND FACING SAID OPEN SIDE, AND WITH THE SPEAKERS DISPOSED TO FORM AN ARCUATE SURFACE, AND ARRANGED IN VERTICAL ROWS ABOUT A CENTRAL SPEAKER SO THAT AS THE DISTANCE FROM THE CENTRAL SPEAKER INCREASES, THE NUMBER OF SPEAKERS IN EACH VERTICAL ROW INCREASES.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |