US3194340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker enclosure system
Assignee: Individual
•
Filing: 1964-05-15
•
Granted: 1965-07-13
•
Expires: 1984-05-15
Abstract
No abstract record available.
Inventors
- 👤 Kuwayama Zennosuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:15
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2869; H04R1/2884; H04R1/2888
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A SPEAKER UNIT COMPRISING AN ENCLOSURE MEMBER OF SUBSTANTIALLY RECTANGULAR PRISMATIC CONFIGURATION AND HAVING A PREDETERMINED RESONANT FREQUENCY AND DELINEATED BY OPPOSITE RESONANT FRONT AND REAR, TOP AND BOTTOM AND SIDE RECTANGULAR WALLS, SAID FRONT WALL HAVING AN APETURE FORMED THEREIN, AN ELECTRICALLY ENERGIZED SPEAKER ELEMENT MOUNTED ON SAID FRONT WALL IN REGISTRY WITH SAID APERTURE, AND WEIGHT MEMBERS SUBSTANTIALLY CENTRALLY MOUNTED ON SAID TOP, BOTTOM, SIDE AND REAR WALLS, SAID WEIGHT SUPPORTING WALLS HAVING RESONANT FREQUENCIES AT LEAST FIFTY CYCLES PER SECOND LESS THAN SAID PREDETERMINED RESONANT FREQUENCY.
Claim 2
Dependent Claim
89 words
A SPEAKER UNIT COMPRISING AN ENCLOSURE MEMBER OF SUBSTANTIALLY RECTANGULAR PRISMATIC CONFIGURATION AND HAVING A PREDETERMINED RESONANT FREQUENCY AND DELINEATED BY OPPOSITE RESONANT FRONT AND REAR, TOP AND BOTTOM AND SIDE RECTANGULAR WALLS, SAID FRONT WALL HAVING AN APETURE FORMED THEREIN, AN ELECTRICALLY ENERGIZED SPEAKER ELEMENT MOUNTED ON SAID FRONT WALL IN REGISTRY WITH SAID APERTURE, AND WEIGHT MEMBERS SUBSTANTIALLY CENTRALLY MOUNTED ON SAID TOP, BOTTOM, SIDE AND REAR WALLS, SAID WEIGHT SUPPORTING WALLS HAVING RESONANT FREQUENCIES AT LEAST FIFTY CYCLES PER SECOND LESS THAN SAID PREDETERMINED RESONANT FREQUENCY.
References Cited (Backward Citations)
US2713396A
Cited
US3101810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |