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Class Information
Number: 367/157
Name: Communications, electrical: acoustic wave systems and devices > Signal transducers > Underwater type > Piezoelectric
Description: Subject matter wherein the energy is converted by a material which exhibits an electrostatic polarization when subjected to mechanical stress or which exhibits mechanical stress tending to produce deflection, expansion, or contraction when subjected to electrical stress.










Sub-classes under this class:

Class Number Class Name Patents
367/160 Bending type 54
367/159 Elongated cylindrical element 102
367/158 Head and tail mass 76
367/166 Liquid filled 62
367/167 Pressure compensating means 50
367/164 Single element having a plurality of electrodes 40
367/165 Specific support structure 176
367/163 With diaphragm 128
367/162 With resonant or damping structure 129


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8647328 Reflected acoustic wave modulation Feb. 11, 2014
8385155 Digital hydrophone Feb. 26, 2013
8324787 Array of electroacoustic transducers and electronic probe for diagnostic images with high focusing depth Dec. 4, 2012
8279713 Acoustic transmitter comprising a plurality of piezoelectric plates Oct. 2, 2012
8277441 Piezoelectric transducer Oct. 2, 2012
8237545 Wireless transponder and image forming device Aug. 7, 2012
8199609 Multi-mode downhole acoustic source Jun. 12, 2012
8121317 Piezoelectric microphone Feb. 21, 2012
8093869 Apparatus for generating electricity utilizing nondestructive interference of energy Jan. 10, 2012
8040249 Acoustic telemetry transceiver Oct. 18, 2011
8027224 Broadband underwater acoustic transducer Sep. 27, 2011
8009517 Wireless communication system, transmitting device, receiving device and information processing apparatus Aug. 30, 2011
7898154 Ultrasound probe and method for manufacturing the same Mar. 1, 2011
7800981 High efficiency portable seismograph for measuring seismic tremor Sep. 21, 2010
7791252 Ultrasound probe assembly and method of fabrication Sep. 7, 2010
7777645 Acoustic telemetry transceiver Aug. 17, 2010
7755255 Ultrasonic probe Jul. 13, 2010
7678055 Ultrasonic probe with a conductive substrate connected to a transducer Mar. 16, 2010
7666142 Ultrasound doppler diagnostic apparatus and image data generating method Feb. 23, 2010
7638924 Method of driving ultrasonic transducer Dec. 29, 2009
7557489 Embedded circuits on an ultrasound transducer and method of manufacture Jul. 7, 2009
7549964 Multiple frequency doppler ultrasound probe Jun. 23, 2009
7529154 Hybrid thin film heterostructure modular vibration control apparatus and methods for fabrication thereof May. 5, 2009
7499377 Pressure wave piezoelectric sensor Mar. 3, 2009
7495370 Hybrid transducer Feb. 24, 2009
7309948 Ultrasonic transducer and method of manufacturing the same Dec. 18, 2007
7309947 Piezoelectric transducer including a plurality of piezoelectric members Dec. 18, 2007
7276838 Piezoelectric transducer including a plurality of piezoelectric members Oct. 2, 2007
7264597 Device and method for producing high-pressure ultrasonic pulses Sep. 4, 2007
7262542 Ultrasound radiation device into a material Aug. 28, 2007
7237564 Distribution of energy in a high frequency resonating wafer processing system Jul. 3, 2007
7216738 Acoustic stimulation method with axial driver actuating moment arms on tines May. 15, 2007
7213681 Acoustic stimulation tool with axial driver actuating moment arms on tines May. 8, 2007
7180225 Piezoelectric vibrator Feb. 20, 2007
7156506 Liquid charging method, liquid container, and method for manufacturing the same Jan. 2, 2007
7132958 Downhole telemetry system using multiple uplink modes as data channels using discrete multi-tone modulation Nov. 7, 2006
7109642 Composite piezoelectric apparatus and method Sep. 19, 2006
7069795 Sensor using electro active curved helix and double helix Jul. 4, 2006
7019649 Pool monitoring Mar. 28, 2006
7019439 High power ultrasonic transducer with broadband frequency characteristics at all overtones and harmonics Mar. 28, 2006
6980109 System and method for monitoring intrusion detection in a pool Dec. 27, 2005
6933658 Method of manufacturing a piezoelectric/electrostrictive device Aug. 23, 2005
6909222 Piezoelectric actuator, and timepiece and portable equipment having the same Jun. 21, 2005
6825594 Ultrasonic transducer Nov. 30, 2004
6739423 Acoustic logging tool May. 25, 2004
6711096 Shaped piezoelectric composite array Mar. 23, 2004
6693849 Piezoelectric audio transducer Feb. 17, 2004
6654316 Single-sided electro-mechanical transduction apparatus Nov. 25, 2003
6567343 Flextensional resonant pipe projector May. 20, 2003
6567342 Flared wave-guide projector May. 20, 2003

1 2 3 4 5










 
 
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