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Class Information
Number: 381/190
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Electrostrictive, magnetostrictive, or piezoelectric
Description: Subject matter including an element which expands or contracts in accordance with an applied electric or magnetic field, or which produces a mechanical stress tending to produce deflection, expansion, or contraction when subjected to an applied electrical voltage.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620193 |
Acoustic actuators |
Nov. 17, 2009 |
| 7596235 |
Transducer |
Sep. 29, 2009 |
| 7583011 |
Package of surface-mountable electronic component |
Sep. 1, 2009 |
| 7583811 |
Electro-optical device and electronic apparatus |
Sep. 1, 2009 |
| 7579753 |
Transducers with annular contacts |
Aug. 25, 2009 |
| RE40860 |
Electrostatic audio loudspeakers |
Jul. 21, 2009 |
| 7555133 |
Electro-acoustic transducer |
Jun. 30, 2009 |
| 7545945 |
Comb sense microphone |
Jun. 9, 2009 |
| 7475598 |
Electromechanical force transducer |
Jan. 13, 2009 |
| 7447324 |
Piezoelectric sounding body and electronic device using the same |
Nov. 4, 2008 |
| 7421088 |
Multifunction transducer |
Sep. 2, 2008 |
| 7378776 |
Piezoelectric ceramic composition and piezoelectric elements using the same |
May. 27, 2008 |
| 7376236 |
Piezoelectric film sonic emitter |
May. 20, 2008 |
| 7333621 |
Conductive stub of sound exciter |
Feb. 19, 2008 |
| 7316289 |
Electro-acoustic transducer and method of manufacturing transducer |
Jan. 8, 2008 |
| 7289638 |
Electroacoustic microphone |
Oct. 30, 2007 |
| 7286680 |
Cylindrical microphone having an electret assembly in the end cover |
Oct. 23, 2007 |
| 7247976 |
Piezoelectric vibrator |
Jul. 24, 2007 |
| 7227966 |
Piezo-electric speaker |
Jun. 5, 2007 |
| 7227967 |
Piezoelectric transducer adapted to bridge of stringed instrument |
Jun. 5, 2007 |
| 7224813 |
Loudspeaker using an electro-active device |
May. 29, 2007 |
| 7224814 |
Two-way communication device |
May. 29, 2007 |
| 7218744 |
Piezo-electric speaker |
May. 15, 2007 |
| 7212641 |
Electromechanical acoustic liner |
May. 1, 2007 |
| 7201996 |
Sound generator for a portable device |
Apr. 10, 2007 |
| 7180225 |
Piezoelectric vibrator |
Feb. 20, 2007 |
| 7177434 |
Stepped sound producing module |
Feb. 13, 2007 |
| 7167570 |
Piezo-electric speaker |
Jan. 23, 2007 |
| 7151837 |
Loudspeaker |
Dec. 19, 2006 |
| 7149318 |
Resonant element transducer |
Dec. 12, 2006 |
| 7141919 |
Piezoelectric electroacoustic transducer |
Nov. 28, 2006 |
| 7136496 |
Electret assembly for a microphone having a backplate with improved charge stability |
Nov. 14, 2006 |
| 7136501 |
Acoustically enhanced electro-dynamic loudspeakers |
Nov. 14, 2006 |
| 7130436 |
Helmet with built-in speaker system and speaker system for helmet |
Oct. 31, 2006 |
| 7106869 |
Condenser microphone |
Sep. 12, 2006 |
| 7095864 |
Electrostatic audio loudspeakers |
Aug. 22, 2006 |
| 7092539 |
MEMS based acoustic array |
Aug. 15, 2006 |
| 7079661 |
Speaker for super-high frequency range reproduction |
Jul. 18, 2006 |
| 7068800 |
Speaker apparatus |
Jun. 27, 2006 |
| 7062058 |
Cylindrical microphone having an electret assembly in the end cover |
Jun. 13, 2006 |
| 7039206 |
Dual diaphragm speaker |
May. 2, 2006 |
| 7027610 |
Loudspeaker |
Apr. 11, 2006 |
| 7019439 |
High power ultrasonic transducer with broadband frequency characteristics at all overtones and harmonics |
Mar. 28, 2006 |
| 7019621 |
Methods and apparatus to increase sound quality of piezoelectric devices |
Mar. 28, 2006 |
| 7020295 |
Piezoelectric electroacoustic transducer and manufacturing method of the same |
Mar. 28, 2006 |
| 7006640 |
Speaker |
Feb. 28, 2006 |
| 7003125 |
Micromachined piezoelectric microspeaker and fabricating method thereof |
Feb. 21, 2006 |
| 6987445 |
Water resistant audible signal |
Jan. 17, 2006 |
| 6978032 |
Piezoelectric speaker |
Dec. 20, 2005 |
| 6965678 |
Electronic article comprising loudspeaker and touch pad |
Nov. 15, 2005 |
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