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Class Information
Number: 381/351
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Having acoustic wave modifying structure > Acoustic enclosure > Plural chambers
Description: Subject matter wherein there is more than one physically distinct compartment space within the housing.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7602934 |
Speaker system with built-in storage of satellite speakers |
Oct. 13, 2009 |
| 7578367 |
Speaker set and electronic product incorporating the same |
Aug. 25, 2009 |
| 7578368 |
Speaker set for electronic product |
Aug. 25, 2009 |
| 7556121 |
Speaker set and mobile phone incorporating the same |
Jul. 7, 2009 |
| 7522742 |
Speaker assembly with moveable baffle |
Apr. 21, 2009 |
| 7522741 |
Electro-acoustic apparatus comprising an electro-acoustic transducer |
Apr. 21, 2009 |
| 7505602 |
Mobile device with improved acoustic porting |
Mar. 17, 2009 |
| 7477755 |
Speaker system |
Jan. 13, 2009 |
| 7463744 |
Porting |
Dec. 9, 2008 |
| 7450733 |
Speaker with externally mounted acoustic extension |
Nov. 11, 2008 |
| 7400910 |
Speaker sound enhancement for a mobile terminal |
Jul. 15, 2008 |
| 7350618 |
Multimedia speaker product |
Apr. 1, 2008 |
| 7280666 |
Moveable device component with acoustic porting |
Oct. 9, 2007 |
| 7277552 |
Increased LF spectrum power density loudspeaker system |
Oct. 2, 2007 |
| 7263387 |
Speaker module design |
Aug. 28, 2007 |
| 7242785 |
Portable powered speaker |
Jul. 10, 2007 |
| 7207413 |
Closed loop embedded audio transmission line technology for loudspeaker enclosures and systems |
Apr. 24, 2007 |
| 7162050 |
Compound sound generator |
Jan. 9, 2007 |
| 7151836 |
Speaker apparatus and sound reproduction apparatus |
Dec. 19, 2006 |
| 7136498 |
Loudspeaker having a dual chamber acoustical enclosure with two external vents and one internal vent |
Nov. 14, 2006 |
| 7123736 |
Double-resonator micro-speaker assemblies and methods for tuning the same |
Oct. 17, 2006 |
| 7068979 |
Mobile telecommunications device |
Jun. 27, 2006 |
| 7068806 |
Condensed speaker system |
Jun. 27, 2006 |
| 7046816 |
Coincident source stereo speaker |
May. 16, 2006 |
| 6995659 |
Sound generating transducer |
Feb. 7, 2006 |
| 6973994 |
Apparatus for increasing the quality of sound from an acoustic source |
Dec. 13, 2005 |
| 6940990 |
Multi-channel audio center speaker device |
Sep. 6, 2005 |
| 6907955 |
Electromagnetic electroacoustic transducer |
Jun. 21, 2005 |
| 6862360 |
Speaker system |
Mar. 1, 2005 |
| 6807284 |
Speaker and speaker device |
Oct. 19, 2004 |
| 6782112 |
Low frequency transducer enclosure |
Aug. 24, 2004 |
| 6771787 |
Waveguide electroacoustical transducing |
Aug. 3, 2004 |
| 6758303 |
Electronic device having a multi-mode acoustic system and method for radiating sound waves |
Jul. 6, 2004 |
| 6751330 |
Speaker system |
Jun. 15, 2004 |
| 6719090 |
Speaker assembly |
Apr. 13, 2004 |
| 6704426 |
Loudspeaker system |
Mar. 9, 2004 |
| 6665413 |
Infrasonic Helmholtz resonator |
Dec. 16, 2003 |
| 6643379 |
Acoustical transducer for recreating a spatial sound stage and improved localization of original sounds sources |
Nov. 4, 2003 |
| 6636750 |
Speakerphone accessory for a portable telephone |
Oct. 21, 2003 |
| 6621910 |
Method and arrangement for improving leak tolerance of an earpiece in a radio device |
Sep. 16, 2003 |
| 6604602 |
Separable speaker cover box containing speaker system |
Aug. 12, 2003 |
| 6522759 |
Speaker |
Feb. 18, 2003 |
| 6504938 |
Dual-chamber loudspeaker |
Jan. 7, 2003 |
| 6487297 |
Structure of a loudspeaker |
Nov. 26, 2002 |
| 6473625 |
Earpiece acoustics |
Oct. 29, 2002 |
| 6430297 |
Speaker and speaker device |
Aug. 6, 2002 |
| 6411721 |
Audio speaker with harmonic enclosure |
Jun. 25, 2002 |
| 6411720 |
Speaker systems with lower frequency of resonance |
Jun. 25, 2002 |
| 6411719 |
Loudspeaker assembly |
Jun. 25, 2002 |
| 6389146 |
Acoustically asymmetric bandpass loudspeaker with multiple acoustic filters |
May. 14, 2002 |
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