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Class Information
Number: 181/166
Name: Acoustics > Diaphragm > With damping means
Description: Subject matter including means to suppress or limit diaphragm vibrations.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4619342 |
Multiple sound transducer system utilizing an acoustic filter to reduce distortion |
Oct. 28, 1986 |
| 4581496 |
Diaphragm for attenuating harmonic response in an electroacoustic transducer |
Apr. 8, 1986 |
| 4478309 |
Speaker equipped with diaphragm filled with foamed resin |
Oct. 23, 1984 |
| 4461932 |
Ribbon type speaker and method of assembling magnetic circuit thereof |
Jul. 24, 1984 |
| 4450930 |
Microphone with stepped response |
May. 29, 1984 |
| 4426556 |
Electrodynamic loudspeaker |
Jan. 17, 1984 |
| 4420061 |
Pentagonal speaker enclosure with a downward directed dynamic damping system |
Dec. 13, 1983 |
| 4387787 |
Loudspeaker having acoustic impedance frontal loading element |
Jun. 14, 1983 |
| 4387275 |
Speaker and speaker system |
Jun. 7, 1983 |
| 4373607 |
Loudspeaker cone stiffeners |
Feb. 15, 1983 |
| 4353432 |
Electro-dynamic speaker |
Oct. 12, 1982 |
| 4346640 |
Decorative light flashing apparatus and acousto-electric transducer therefor |
Aug. 31, 1982 |
| 4319098 |
Loudspeaker having a unitary mechanical-acoustic diaphragm termination |
Mar. 9, 1982 |
| 4291205 |
Laminated loudspeaker diaphragm with honeycomb core and damping layers |
Sep. 22, 1981 |
| 4283606 |
Coaxial loudspeaker system |
Aug. 11, 1981 |
| 4276452 |
Membrane type electro-acoustic transducer |
Jun. 30, 1981 |
| 4275278 |
Diaphragm for a loudspeaker |
Jun. 23, 1981 |
| 4256198 |
Acoustic apparatus |
Mar. 17, 1981 |
| 4252211 |
Loudspeaker |
Feb. 24, 1981 |
| 4225010 |
Loudspeaker system |
Sep. 30, 1980 |
| 4206832 |
Drone acoustical transducer |
Jun. 10, 1980 |
| 4140203 |
Acoustic diaphragm with polyurethane elastomer coating |
Feb. 20, 1979 |
| 4139733 |
Electro acoustic transducer with improved diaphragm |
Feb. 13, 1979 |
| 4131180 |
Speaker system |
Dec. 26, 1978 |
| 4112168 |
High stiffness speaker cone |
Sep. 5, 1978 |
| 4100992 |
Loudspeaker |
Jul. 18, 1978 |
| 4076098 |
Loudspeaker diaphragm |
Feb. 28, 1978 |
| 4073366 |
Disposable noise reducing hearing aid attachment |
Feb. 14, 1978 |
| 4034165 |
Transducer with rearwardly disposed damping elements |
Jul. 5, 1977 |
| 4030564 |
Loud speaker with stable damping |
Jun. 21, 1977 |
| 4029171 |
Membrane for electroacoustic converter systems |
Jun. 14, 1977 |
| 4020299 |
Electro-acoustic transducer diaphragms |
Apr. 26, 1977 |
| 3997739 |
Electrodynamic type electroacoustic transducer |
Dec. 14, 1976 |
| 3976848 |
Disposable noise reducing hearing aid attachment |
Aug. 24, 1976 |
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