US3114429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker
Assignee: Hoffman Electronics Corp
•
Filing: 1961-01-16
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Granted: 1963-12-17
•
Expires: 1981-01-16
Abstract
No abstract record available.
Inventors
- 👤 Carroll R Miner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:16
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/283; H04R1/2834
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A LOUDSPEAKER DEVICE COMPRISING: A LOUDSPEAKER HAVING A VIBRATORY CONE CONNECTED AT ITS BASE END TO A RIGID SUPPORT MEMBER; A RECTANGULAR PLANAR PANEL HAVING A CENTRAL OPENING AND A HIGH STIFFNESS-TO-MASS RATIO; AND A CYLINDRICAL COLLAR, SAID PANEL BEING CONNECTED BY MEANS OF SAID COLLAR TO THE BASE REGION OF SAID CONE FOR VIBRATION THEREWITH, SAID OPENING BEING OF SUBSTANTIALLY THE SAME DIAMETER AS SAID BASE REGION, AND SAID PANEL BEING MOUNTED SO THAT SAID OPENING IS CO-AXIAL WITH RESPECT TO SAID BASE REGION.
Claim 2
Dependent Claim
85 words
A LOUDSPEAKER DEVICE COMPRISING: A LOUDSPEAKER HAVING A VIBRATORY CONE CONNECTED AT ITS BASE END TO A RIGID SUPPORT MEMBER; A RECTANGULAR PLANAR PANEL HAVING A CENTRAL OPENING AND A HIGH STIFFNESS-TO-MASS RATIO; AND A CYLINDRICAL COLLAR, SAID PANEL BEING CONNECTED BY MEANS OF SAID COLLAR TO THE BASE REGION OF SAID CONE FOR VIBRATION THEREWITH, SAID OPENING BEING OF SUBSTANTIALLY THE SAME DIAMETER AS SAID BASE REGION, AND SAID PANEL BEING MOUNTED SO THAT SAID OPENING IS CO-AXIAL WITH RESPECT TO SAID BASE REGION.
References Cited (Backward Citations)
GB265908A
Cited
US1763054A
Cited
US2439666A
Cited
US2630189A
Cited
US2685935A
Cited
US2853146A
Cited
US2926741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |