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Class Information
Number: 381/186
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Plural or compound reproducers > Plural diaphragms
Description: Subject matter including a speaker having plural flexible membranes, for radiating sound waves.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7570774 |
Speaker having improved sound-radiating function to both directions |
Aug. 4, 2009 |
| 7555133 |
Electro-acoustic transducer |
Jun. 30, 2009 |
| 7551749 |
Baffle vibration reducing |
Jun. 23, 2009 |
| 7539318 |
Speaker unit, method for fabricating the same, and speaker apparatus |
May. 26, 2009 |
| 7519191 |
Loudspeaker, manufacturing method thereof, and mobile telephone using the same |
Apr. 14, 2009 |
| 7515723 |
Electro-acoustic converter with demountable diaphragm and voice coil assembly |
Apr. 7, 2009 |
| 7502485 |
Loudspeaker, loudspeaker module, and electronic equipment using the loudspeaker module |
Mar. 10, 2009 |
| 7499555 |
Personal communication method and apparatus with acoustic stray field cancellation |
Mar. 3, 2009 |
| 7454030 |
Subwoofer with cascaded linear array of drivers |
Nov. 18, 2008 |
| 7436738 |
Play-back device |
Oct. 14, 2008 |
| 7418104 |
Speaker system |
Aug. 26, 2008 |
| 7415125 |
Apparatus and method for creating acoustic energy in a receiver assembly with improved diaphragms-linkage arrangement |
Aug. 19, 2008 |
| 7409071 |
Large-diameter arcuate speaker |
Aug. 5, 2008 |
| 7388960 |
Multimedia speaker headphone |
Jun. 17, 2008 |
| 7333621 |
Conductive stub of sound exciter |
Feb. 19, 2008 |
| 7329933 |
Silicon microphone with softly constrained diaphragm |
Feb. 12, 2008 |
| 7324834 |
Speaker system |
Jan. 29, 2008 |
| 7317810 |
Magnetic circuit and speaker |
Jan. 8, 2008 |
| 7245729 |
Loudspeaker |
Jul. 17, 2007 |
| 7218743 |
Speaker module and apparatus using this |
May. 15, 2007 |
| 7210213 |
Method for manufacturing a dynamic speaker |
May. 1, 2007 |
| 7171013 |
Loud speaker |
Jan. 30, 2007 |
| 7162050 |
Compound sound generator |
Jan. 9, 2007 |
| 7142680 |
Multiple waveguide coaxial ceiling loudspeaker |
Nov. 28, 2006 |
| 7120264 |
Sound reproducing apparatus |
Oct. 10, 2006 |
| 7050600 |
Speaker system, mobile terminal device, and electronic device |
May. 23, 2006 |
| 7021419 |
Speaker system |
Apr. 4, 2006 |
| 6996243 |
Loudspeaker with shaped sound field |
Feb. 7, 2006 |
| 6985593 |
Baffle vibration reducing |
Jan. 10, 2006 |
| 6980664 |
Double-dome speaker |
Dec. 27, 2005 |
| 6963651 |
Single magnetic circuit dual output speaker |
Nov. 8, 2005 |
| 6963650 |
Coaxial speaker with step-down ledge to eliminate sound wave distortions and time delay |
Nov. 8, 2005 |
| 6940990 |
Multi-channel audio center speaker device |
Sep. 6, 2005 |
| 6925191 |
Flat panel speaker |
Aug. 2, 2005 |
| 6925190 |
Flush mount speaker mounting apparatus |
Aug. 2, 2005 |
| 6910549 |
Embedded multimedia speaker structure |
Jun. 28, 2005 |
| 6834113 |
Loudspeaker system |
Dec. 21, 2004 |
| 6813362 |
Loudspeaker and method of making same |
Nov. 2, 2004 |
| 6804370 |
Speaker capable to playback in wide frequency range |
Oct. 12, 2004 |
| 6782112 |
Low frequency transducer enclosure |
Aug. 24, 2004 |
| 6778675 |
Speaker device |
Aug. 17, 2004 |
| 6766027 |
Elliptical flushmount speaker |
Jul. 20, 2004 |
| 6731765 |
Loudspeaker device |
May. 4, 2004 |
| 6721431 |
Prismatic loudspeaker/microphone array |
Apr. 13, 2004 |
| 6721436 |
Remote edge-driven panel speaker |
Apr. 13, 2004 |
| 6704426 |
Loudspeaker system |
Mar. 9, 2004 |
| 6678384 |
Speaker structure |
Jan. 13, 2004 |
| 6647122 |
Loudspeaker drive unit |
Nov. 11, 2003 |
| 6493452 |
Speaker unit |
Dec. 10, 2002 |
| 6466676 |
Compound driver for acoustical applications |
Oct. 15, 2002 |
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