Patents for H04R 17 - Piezo-electric transducers; Electrostrictive transducers (7,213)
12/1992
12/02/1992EP0516175A2 Twisting actuators
12/02/1992EP0515557A1 Method and device for generating an ultrasonic wave
12/01/1992CA2066084A1 Twisting actuators
11/1992
11/24/1992US5166907 Frequency agile sonic transducer
11/24/1992US5166573 Ultrasonic contact transducer and array
11/24/1992US5165809 Piezoelectric actuator and print head using the actuator, having means for increasing durability of laminar piezoelectric driver
11/24/1992CA1310739C Broadband omnidirectional electroacoustic transducer
11/17/1992US5164920 Composite ultrasound transducer and method for manufacturing a structured component therefor of piezoelectric ceramic
11/17/1992US5163436 Ultrasonic probe system
11/03/1992US5161200 Microphone
10/1992
10/29/1992WO1992019018A1 Piezo-electric resonant vibrator for a selective call receiver
10/27/1992US5159228 Pressure wave sensor
10/13/1992US5155408 Piezoelectric transducer having piezoelectric elements free from stress concentrations
10/06/1992US5153859 Laminated piezoelectric structure and process of forming the same
10/01/1992DE4209821A1 Rotary damper unit - has notched rotor accommodating rollers working against annular elastic component in circular recess
09/1992
09/22/1992US5148810 Variable origin-variable angle acoustic scanning method and apparatus
09/22/1992CA2038739A1 Directional electro-acoustic transducers having a two-part sealed shell
09/22/1992CA2038738A1 Electro-acoustic transducers with flexible waterproof emitting shell
09/17/1992DE4107298A1 Acoustic spherical radiator of first order - has piezoelectric transducer discs within interior of thin-walled sphere
09/15/1992US5148074 For converting electric energy to mechanical energy
09/09/1992CN2115635U Bell shape piezoelectric loudspeaker
09/01/1992US5144186 Ultrasonic sandwich transducer with an astigmatic sonic lobe
08/1992
08/25/1992US5142511 Piezoelectric transducer
08/25/1992US5142510 Acoustic transducer and method of making the same
08/25/1992US5142187 Piezoelectric composite transducer for use in ultrasonic probe
08/12/1992EP0498015A1 Process for manufacturing ultrasonic transducers
07/1992
07/14/1992US5129403 Method and apparatus for detecting and transducing intersaccular acoustic signals
07/14/1992CA1305248C Piezoelectric sensor with at least one pair of long, flexible, sensitiveelements
07/07/1992US5128905 Acoustic field transducers
07/01/1992EP0492882A2 Moment bender transducer drive
06/1992
06/30/1992US5126618 Longitudinal-effect type laminar piezoelectric/electrostrictive driver, and printing actuator using the driver
06/30/1992US5126614 Piezoelectric device and related converting devices
06/25/1992WO1992010916A1 Novel electrostrictive driving device, process for sonic wave projection and polymer materials for use therein
06/17/1992EP0490260A2 Ferroelectric ceramic transducer
06/16/1992US5122993 Piezoelectric transducer
06/16/1992US5121628 Ultrasonic detection system
05/1992
05/26/1992US5115809 Ultrasonic probe
05/19/1992US5115472 Electroacoustic novelties
05/13/1992EP0485261A1 Downhole acoustic transducer
05/06/1992EP0483559A2 Handset structure for telephone sets
05/06/1992CN1016570B Piezoelectric sensor comprising at least one pair of flexible sensitive elements of great length
05/06/1992CN1016569B Tubular piezo-electric sensor with high sensitivity
05/05/1992US5109860 Probe with curved bar for an echograph
04/1992
04/22/1992EP0297101B1 Flextensional transducers
04/22/1992EP0297100B1 Sonar transducers
04/21/1992US5105814 Method of transforming a multi-beam ultrasonic image
04/14/1992US5105116 Piezoelectric transducer and sound-generating device
04/09/1992DE4042315A1 Acoustic coupling system for handsets
04/08/1992EP0479604A2 Method and apparatus for presentation of on-line directional sound
04/08/1992EP0478611A1 Wide-range ultrasonic transducer.
04/08/1992CN1060192A Acoustic transmitter
04/07/1992US5103214 Auxiliary alarm
04/02/1992WO1992005592A1 Piezoelectric component-mounting foil and foil-making method
04/01/1992EP0477575A1 Ultrasonic converter, in particular for air and gas flow measurement, and process of manufacturing the same
03/1992
03/31/1992US5099815 Fuel injection valve and fuel supply system equipped therewith for internal combustion engines
03/31/1992CA1298395C Ultrasound apparatus probe with a priezoelectric member strap
03/29/1992WO1992006567A1 Acoustic transmitter
03/26/1992CA2052034A1 Us transducer for air and gas flow measurement and a method for the manufacture thereof
03/25/1992CN1016038B Loud speakers
03/24/1992US5097709 Ultrasonic imaging system
03/19/1992WO1992004134A1 Ultrasonic transducer for measuring the travel times of ultrasonic pulses in a gas
03/18/1992EP0475208A2 Electroacoustic piezoelectric transducer
03/17/1992CA1297579C Piezo-electric transducer with several coaxial sensitive elements
03/12/1992DE4028315A1 Ultraschallwandler fuer die laufzeitmessung von ultraschall-impulsen in einem gas Ultrasonic transducer for the measurement of maturity ultrasound pulses in a gas
03/11/1992EP0473959A2 Method of transforming a multi-beam sonar image
03/03/1992US5093810 Transducer
03/03/1992US5093742 Ferro-electric liquid-crystal panel having a chiral-nematic mesophase in a phase translation system
03/03/1992US5092336 Method and device for localization and focusing of acoustic waves in tissues
02/1992
02/26/1992EP0472085A1 Ultrasound transducer
02/25/1992CA1296418C Microphone with frequency pre-emphasis
02/06/1992WO1992002012A1 Composite acoustic system for telephone hand-sets
01/1992
01/29/1992EP0468627A2 Method for bonding together hollow glass spheres
01/21/1992CA1294700C Piezoelectric element array echography probe
01/14/1992CA1294360C Ring-shell projector
01/14/1992CA1294359C Flexural disk resonant cavity transducer
01/01/1992CN1015289B Electroacoustic transducer
12/1991
12/27/1991EP0462311A1 Composite ultrasound transducer and fabrication process of a structured component from piezoelectric ceramic
11/1991
11/27/1991WO1991019372A1 Piezoelectric sounding device and method of manufacturing the same
11/27/1991EP0458146A2 Ultrasonic transducer with reduced acoustic cross coupling
11/21/1991EP0457467A2 Acoustic transducers
11/21/1991EP0457211A2 Piezoelectric sound generator and process for its manufacture
11/21/1991EP0456968A2 Piezoelectric transducer
11/20/1991CN1056267A Ultrasonic transducer
11/19/1991US5065629 Ultrasonic insection apparatus
11/14/1991WO1991017637A1 Ultrasonic transducer
11/14/1991CA2081472A1 Ultrasonic transducer
11/13/1991EP0456302A2 Inter-element mounting for stacked piezoelectric transducers
11/13/1991EP0455970A1 Acoustic image signal delay
11/12/1991US5065068 Ferroelectric ceramic transducer
11/10/1991WO1991017539A1 Loading of flextensional transducer shells
11/10/1991CA2079913A1 Loading of flextensional transducer shells
11/05/1991CA2041628A1 Inter-element mounting for stacked piezoelectric transducers
10/1991
10/31/1991WO1991016732A1 Piezo-electric resonant vibrator for a selective call receiver
10/29/1991US5062139 Coaxial loud speaker system
10/16/1991EP0451984A2 Ultrasonic probe system
10/16/1991EP0451306A1 Frequency-selective laminated ultrasound transducer
10/09/1991EP0450868A2 Ultrasonic probe having a piezoelectric element
10/08/1991US5056069 Ultrasonic sensor
10/02/1991EP0448604A1 Process for producing highly crystalline and homogeneous sub-micron doped and undoped piezoelectric ceramic powders with controlled stoichiometry and particle size
09/1991
09/19/1991WO1991014350A1 Microphone operating on body-borne noise
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