Patent US3293718A successfully refreshed from Google Patents.
Patent US3239028A successfully refreshed from Google Patents.
US3239028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound reproduction system
Assignee: Individual
•
Filing: 1963-11-01
•
Granted: 1966-03-08
•
Expires: 1983-11-01
Abstract
No abstract record available.
Inventors
- 👤 Willard A Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:18
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/283; H04R1/2834; H04R1/2838; H04R1/2842
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
SOUND-REPRODUCING APPARATUS COMPRISING CABINET MEANS WHICH DEFINES AN ENCLOSED CAVITY, SAID CABINET MEANS HAVING FRONT AND REAR WALL PORTIONS, SAID FRONT WALL PORTION BEING PROVIDED WITH A SPEAKER OPENING AND AT LEAST ONE APERTURE, A DIAPHRAGM SPEAKER MOUNTED WITHIN SAID CAVITY ON SAID FRONT WALL PORTION WITH THE DIAPHRAGM OVER SAID SPEAKER OPENING, AND PANEL MEANS SPACED FROM AND MOUNTED ON SAID FRONT WALL PORTION ON THE SIDE OPPOSITE SAID SPEAKER AND DEFINING A CHAMBER THEREWITH HAVING A PERIPHERAL EDGE PORTION WHICH IS OPEN, SAID PANEL MEANS OVER LYING SAID OPENING AND APERTURE, SAID CABINET MEANS BEING OF A VIBRATION TRANSFERRING MATERIAL; SAID CAVITY, SAID CHAMBER, SAID OPENING AND SAID APERTURE BEING OF SUCH SIZES AS WILL VIBRATIONALLY COUPLE SAID DIAPHRAGM TO SAID CABINET MEANS TO PRODUCE OMNIDIRECTIONAL RADIATION OF SOUND BY SAID DIAPHRAGM, SAID CABINET MEANS AND SAID PANEL MEANS AS A COMMON SOUND SOURCE; SAID SIZES
Claim 2
Dependent Claim
148 words
SOUND-REPRODUCING APPARATUS COMPRISING CABINET MEANS WHICH DEFINES AN ENCLOSED CAVITY, SAID CABINET MEANS HAVING FRONT AND REAR WALL PORTIONS, SAID FRONT WALL PORTION BEING PROVIDED WITH A SPEAKER OPENING AND AT LEAST ONE APERTURE, A DIAPHRAGM SPEAKER MOUNTED WITHIN SAID CAVITY ON SAID FRONT WALL PORTION WITH THE DIAPHRAGM OVER SAID SPEAKER OPENING, AND PANEL MEANS SPACED FROM AND MOUNTED ON SAID FRONT WALL PORTION ON THE SIDE OPPOSITE SAID SPEAKER AND DEFINING A CHAMBER THEREWITH HAVING A PERIPHERAL EDGE PORTION WHICH IS OPEN, SAID PANEL MEANS OVER LYING SAID OPENING AND APERTURE, SAID CABINET MEANS BEING OF A VIBRATION TRANSFERRING MATERIAL; SAID CAVITY, SAID CHAMBER, SAID OPENING AND SAID APERTURE BEING OF SUCH SIZES AS WILL VIBRATIONALLY COUPLE SAID DIAPHRAGM TO SAID CABINET MEANS TO PRODUCE OMNIDIRECTIONAL RADIATION OF SOUND BY SAID DIAPHRAGM, SAID CABINET MEANS AND SAID PANEL MEANS AS A COMMON SOUND SOURCE; SAID SIZES
References Cited (Backward Citations)
US3104730A
Cited
FR681819A
Cited
US1923870A
Cited
GB371433A
Cited
US2013695A
Cited
US2065367A
Cited
US2121008A
Cited
US2476572A
Cited
US2713396A
Cited
US2840181A
Cited
US2982372A
Cited
AT212897B
Cited
US3076520A
Cited
US3101810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |