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Class Information
Number: 381/182
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Plural or compound reproducers
Description: Subject matter having a plurality of sound producing transducer having two or more elements performing the same or similar functions.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6931140 |
Electro-acoustic transducer with two diaphragms |
Aug. 16, 2005 |
| 6876752 |
Loudspeakers systems and components thereof |
Apr. 5, 2005 |
| 6870942 |
Loudspeaker for line array sound system |
Mar. 22, 2005 |
| 6830275 |
Speaker mounted in recreational vehicle |
Dec. 14, 2004 |
| 6829365 |
MP-3 player |
Dec. 7, 2004 |
| 6819767 |
Speaker unit and sound reproduction apparatus using the same |
Nov. 16, 2004 |
| 6766027 |
Elliptical flushmount speaker |
Jul. 20, 2004 |
| 6766033 |
Modular bass arraying |
Jul. 20, 2004 |
| 6744895 |
Loudspeaker |
Jun. 1, 2004 |
| 6731765 |
Loudspeaker device |
May. 4, 2004 |
| 6724907 |
Tweeter support rack structure |
Apr. 20, 2004 |
| 6721431 |
Prismatic loudspeaker/microphone array |
Apr. 13, 2004 |
| 6711274 |
Compound speaker for a portable communication device |
Mar. 23, 2004 |
| 6683963 |
Interchangeable pivoting loudspeaker assembly with spring retained high frequency transducer |
Jan. 27, 2004 |
| 6678384 |
Speaker structure |
Jan. 13, 2004 |
| 6678381 |
Ultra-directional speaker |
Jan. 13, 2004 |
| 6658121 |
Headphone having an adjustable localization of auditory events |
Dec. 2, 2003 |
| 6658129 |
Passive radiator having mass elements |
Dec. 2, 2003 |
| 6647122 |
Loudspeaker drive unit |
Nov. 11, 2003 |
| 6628793 |
Speaker system |
Sep. 30, 2003 |
| 6628792 |
Back to back mounted compound woofer with compression/bandpass loading |
Sep. 30, 2003 |
| 6628790 |
Apparatus for on-ear operation and off-ear operation with two sound reproduction transducers |
Sep. 30, 2003 |
| 6625289 |
Stereo loudspeaker system |
Sep. 23, 2003 |
| 6625291 |
Diffused resonance loudspeaker enclosure method |
Sep. 23, 2003 |
| 6621909 |
Horn loudspeaker and loudspeaker systems |
Sep. 16, 2003 |
| 6580801 |
Loudspeaker apparatus |
Jun. 17, 2003 |
| 6513622 |
Full-range loudspeaker system for cinema screen |
Feb. 4, 2003 |
| 6516072 |
Loudspeaker |
Feb. 4, 2003 |
| 6493452 |
Speaker unit |
Dec. 10, 2002 |
| 6490360 |
Dual bi-laminate polymer audio transducer |
Dec. 3, 2002 |
| 6466675 |
Loudspeaker system |
Oct. 15, 2002 |
| 6453050 |
Piezoelectric speaker, method for producing the same, and speaker system including the same |
Sep. 17, 2002 |
| 6411718 |
Sound reproduction employing unity summation aperture loudspeakers |
Jun. 25, 2002 |
| 6393132 |
Speaker |
May. 21, 2002 |
| 6393131 |
Loudspeaker |
May. 21, 2002 |
| 6389141 |
Combination of a speaker case and a connector for connecting two speaker cases |
May. 14, 2002 |
| 6356640 |
Direction adjusting arrangement for tweeter |
Mar. 12, 2002 |
| 6343134 |
Loudspeaker and horn with an additional transducer |
Jan. 29, 2002 |
| 6339649 |
Loudspeaker system with stackable loudspeaker units |
Jan. 15, 2002 |
| 6335975 |
Rainproof and omnidirectional loudspeaker system |
Jan. 1, 2002 |
| 6282297 |
Angle adjustment structure for speaker system |
Aug. 28, 2001 |
| 6259799 |
Speaker system |
Jul. 10, 2001 |
| 6222929 |
Speaker having middle-high sound speakers |
Apr. 24, 2001 |
| 6215883 |
Loudspeaker with movable virtual point source |
Apr. 10, 2001 |
| 6212284 |
Sound reproduction device |
Apr. 3, 2001 |
| 6134332 |
Sound lens speaker system |
Oct. 17, 2000 |
| 6128395 |
Loudspeaker system with controlled directional sensitivity |
Oct. 3, 2000 |
| 6101262 |
Flush-mount pivoting speaker |
Aug. 8, 2000 |
| 6095278 |
Base for holding the tweeter of a speaker |
Aug. 1, 2000 |
| 6091828 |
Dynamic microphone |
Jul. 18, 2000 |
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