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Class Information
Number: 181/163
Name: Acoustics > Diaphragm > Plural dependent diaphragms
Description: Subject matter wherein two or more diaphragms are driven by the same mechanism, or arranged so that the sound waves produced by one cause the other to vibrate.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4472604 |
Planar type electro-acoustic transducer and process for manufacturing same |
Sep. 18, 1984 |
| 4420061 |
Pentagonal speaker enclosure with a downward directed dynamic damping system |
Dec. 13, 1983 |
| 4379951 |
Electro-acoustic transducer means |
Apr. 12, 1983 |
| 4350847 |
Subwoofer system using a passive radiator |
Sep. 21, 1982 |
| 4301332 |
Woofer loudspeaker |
Nov. 17, 1981 |
| 4286688 |
Loudspeaker apparatus |
Sep. 1, 1981 |
| 4276446 |
Acoustic transducer system |
Jun. 30, 1981 |
| 4231445 |
Acoustic lens speaker cabinet |
Nov. 4, 1980 |
| 4207963 |
Loudspeaker system |
Jun. 17, 1980 |
| 4206830 |
Vehicle speaker system provided with a passive radiator |
Jun. 10, 1980 |
| 4205585 |
Audio/visual conversion system |
Jun. 3, 1980 |
| 4168762 |
Loudspeaker enclosure |
Sep. 25, 1979 |
| 4146111 |
Speaker system |
Mar. 27, 1979 |
| 4146744 |
Low Q multiple in phase high compliance driver ported loudspeaker enclosure |
Mar. 27, 1979 |
| 4142603 |
Adjustable speaker cabinet |
Mar. 6, 1979 |
| 4131180 |
Speaker system |
Dec. 26, 1978 |
| 4107479 |
Electro-acoustic transducer |
Aug. 15, 1978 |
| 4039044 |
Low frequency electro-acoustic transducer with interconnected diaphragms interleaved with fixed diaphragms |
Aug. 2, 1977 |
| 4016953 |
Push-pull transducer system |
Apr. 12, 1977 |
| 3985201 |
Infinite sound reproduction chamber |
Oct. 12, 1976 |
| 3940576 |
Loudspeaker having sound funnelling element |
Feb. 24, 1976 |
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