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Class Information
Number: 181/161
Name: Acoustics > Diaphragm > With direct mechanical connection to drive unit
Description: Subject matter including a mechanical means which directly connects the diaphragm to a driver unit.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7306073 |
Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves |
Dec. 11, 2007 |
| 7258195 |
Electromagnetic holding brake |
Aug. 21, 2007 |
| 7155021 |
Loudspeaker having an acoustic panel and an electrical driver |
Dec. 26, 2006 |
| 7050593 |
Vehicular audio system and electromagnetic transducer assembly for use therein |
May. 23, 2006 |
| 6870941 |
Dipole radiating dynamic speaker |
Mar. 22, 2005 |
| 6748090 |
Multi-mode radiator panels |
Jun. 8, 2004 |
| 6672423 |
Speaker and method of assembling the speaker |
Jan. 6, 2004 |
| 6578661 |
Speaker apparatus |
Jun. 17, 2003 |
| 6513623 |
Speaker |
Feb. 4, 2003 |
| 6484844 |
Speaker |
Nov. 26, 2002 |
| 6474440 |
Diaphragm for speaker and speaker device provided with the same |
Nov. 5, 2002 |
| 6438242 |
Acoustic transducer panel |
Aug. 20, 2002 |
| 6307133 |
Drumhead dampening device |
Oct. 23, 2001 |
| 6201878 |
Portable compact disc player |
Mar. 13, 2001 |
| 6095278 |
Base for holding the tweeter of a speaker |
Aug. 1, 2000 |
| 5424496 |
Electromagnetic converter |
Jun. 13, 1995 |
| 5125031 |
Speaker system with focused vibration |
Jun. 23, 1992 |
| 5081387 |
Pump motor/basket brake for an automatic washer |
Jan. 14, 1992 |
| 5022084 |
Speaker |
Jun. 4, 1991 |
| 4998283 |
Screen device |
Mar. 5, 1991 |
| 4967871 |
Body-sensible acoustic device |
Nov. 6, 1990 |
| 4961227 |
Portable loud speaker system |
Oct. 2, 1990 |
| 4837833 |
Microphone with frequency pre-emphasis channel plate |
Jun. 6, 1989 |
| 4823907 |
Balloon assembly |
Apr. 25, 1989 |
| 4808202 |
Adsorptive fiber sheet |
Feb. 28, 1989 |
| 4805732 |
Motor powered sound emitter |
Feb. 21, 1989 |
| 4483411 |
Tunable marine seismic source |
Nov. 20, 1984 |
| 4433750 |
Synthetic horn projector with metal insert |
Feb. 28, 1984 |
| 4379952 |
Mechanical filter for an electrodynamic transducer |
Apr. 12, 1983 |
| 4379951 |
Electro-acoustic transducer means |
Apr. 12, 1983 |
| 3992016 |
Simplified phonograph |
Nov. 16, 1976 |
| 3939942 |
Electroacoustic transducers |
Feb. 24, 1976 |
| 3937905 |
Moving voice coil transducer having a flat diaphragm of an impregnated knit |
Feb. 10, 1976 |
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