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