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Class Information
Number: 310/322
Name: Electrical generator or motor structure > Non-dynamoelectric > Piezoelectric elements and devices > Combined with resonant structure > Acoustic wave type generator or receiver
Description: Subject matter wherein the mechanical energy applied to or produced by the resonant structure is disclosed as being caused by or producing traveling compressions in an elastic material.










Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
6307300 Piezoelectric acoustic component Oct. 23, 2001
6300706 Compound semiconductor monolithic frequency sources and actuators Oct. 9, 2001
6262637 Duplexer incorporating thin-film bulk acoustic resonators (FBARs) Jul. 17, 2001
6222116 Pre-equilibrium chemical reaction energy converter Apr. 24, 2001
6218766 Loudspeaker assembly Apr. 17, 2001
6218768 Power ultrasonic transducer Apr. 17, 2001
6196059 Piezoelectric resonator, process for the fabrication thereof including its use as a sensor element for the determination of the concentration of a substance contained in a liquid and/or for th Mar. 6, 2001
6145186 Wafer fabricated electroacoustic transducer Nov. 14, 2000
6140740 Piezoelectric transducer Oct. 31, 2000
H1875 Electroacoustic transducer Oct. 3, 2000
6121716 Apparatus and method for prevention of cracking in welded brittle alloys Sep. 19, 2000
6117355 Piezoelectric ceramic composition and piezoelectric element using the piezoelectric ceramic composition Sep. 12, 2000
RE36828 Electroacoustic transducer Aug. 22, 2000
6107722 Ultrasound transducer Aug. 22, 2000
6051913 Electroacoustic transducer and acoustic isolator for use therein Apr. 18, 2000
6047603 Ultrasonic sensor Apr. 11, 2000
6023123 Acoustic vibration generator Feb. 8, 2000
6019852 Ultrasonic cleaning method in which ultrasonic energy of different frequencies is utilized simultaneously Feb. 1, 2000
5989202 Medical ultrasonic generator Nov. 23, 1999
5945770 Multilayer ultrasound transducer and the method of manufacture thereof Aug. 31, 1999
5910756 Filters and duplexers utilizing thin film stacked crystal filter structures and thin film bulk acoustic wave resonators Jun. 8, 1999
5900572 Pliable pickup for stringed instrument May. 4, 1999
5895855 Ultrasonic probe transmitting/receiving an ultrasonic wave of a plurality of frequencies and ultrasonic wave inspection apparatus using the same Apr. 20, 1999
5886454 Ultrasonic probe and manufacturing method thereof Mar. 23, 1999
5872506 Piezoelectric transducer having directly mounted electrical components and noise making device utilizing same Feb. 16, 1999
5872493 Bulk acoustic wave (BAW) filter having a top portion that includes a protective acoustic mirror Feb. 16, 1999
5872416 Surface acoustic wave machine Feb. 16, 1999
5867450 State switched acoustic transducer Feb. 2, 1999
5865199 Ultrasonic cleaning apparatus Feb. 2, 1999
5838805 Piezoelectric transducers Nov. 17, 1998
5834877 Ultrasonic transducer units for web detection and the like Nov. 10, 1998
5832412 Programmable digital frequency ultrasonic generator Nov. 3, 1998
5804906 Sound generating device Sep. 8, 1998
5802196 Speaker for radiating sound waves in all directions relative to a speaker supporting surface Sep. 1, 1998
5784340 Piezoelectric acoustic device Jul. 21, 1998
5761156 Piezoelectric ultrasonic transducer Jun. 2, 1998
5747906 Electroacoustic transducer May. 5, 1998
5748566 Ultrasonic transducer May. 5, 1998
5736808 Piezoelectric speaker Apr. 7, 1998
5726952 Sound or ultrasound sensor Mar. 10, 1998
5724186 Ultrasonic rearview mirror Mar. 3, 1998
5702629 Piezeoelectric ceramic-polymer composites Dec. 30, 1997
5698928 Thin film piezoelectric arrays with enhanced coupling and fabrication methods Dec. 16, 1997
5684884 Piezoelectric loudspeaker and a method for manufacturing the same Nov. 4, 1997
5670932 Piezoelectric sounder Sep. 23, 1997
5659220 Ultrasonic transducer Aug. 19, 1997
5650685 Microcircuit package with integrated acoustic isolator Jul. 22, 1997
5598050 Acoustic actuator and flextensional cover plate there for Jan. 28, 1997
5594293 Electroacoustic energy converter for transformation between thermal and electrical energy Jan. 14, 1997
5584447 Noise control using a plate radiator and an acoustic resonator Dec. 17, 1996

1 2 3 4 5 6 7 8 9










 
 
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