| Patents for H04R 17 - Piezo-electric transducers; Electrostrictive transducers (7,213) |
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| 04/06/1994 | EP0590176A1 Ultrasonic transducer arrangement with acoustic matching layer |
| 03/31/1994 | WO1994007236A1 Ultrasonic transducer |
| 03/31/1994 | DE4235089C1 Ultrasound transducer with piezoelectric element - has weighting ring with radial incisions concentric to transducer element on matching body |
| 03/30/1994 | EP0589396A2 Ultrasound transducer with improved rigid backing |
| 03/29/1994 | US5298602 Polymeric piezoelectric material |
| 03/29/1994 | US5297553 Ultrasound transducer with improved rigid backing |
| 03/29/1994 | CA1328124C Ultrasound generator and emitter |
| 03/24/1994 | CA2106444A1 Ultrasound transducer with improved rigid backing |
| 03/15/1994 | US5295194 Multi-driver loudspeaker assembly |
| 03/08/1994 | US5293353 Method for manufacturing an acoustic sensor, and acoustic sensor obtained thereby, having a substantially non-detachable protective layer |
| 03/03/1994 | WO1994005134A1 Electronic component |
| 03/03/1994 | WO1994005004A1 Ultrasonic transducer |
| 03/03/1994 | DE4190521C1 Auf Körperschall ansprechendes Mikrofon On-borne sound appealing microphone |
| 03/01/1994 | US5291460 Piezoelectric sounding body |
| 02/17/1994 | DE4230773C1 Ultraschallwandler Ultrasonic transducer |
| 02/15/1994 | US5287332 Acoustic particle acceleration sensor and array of such sensors |
| 02/15/1994 | US5287331 Air coupled ultrasonic transducer |
| 02/01/1994 | US5283835 Ferroelectric composite film acoustic transducer |
| 01/26/1994 | CN1081272A Piezo horn with carbon inke electrodes |
| 01/20/1994 | DE4323425A1 Piezoelectric horn for use in e.g. smoke detector - has ceramic element with two electrodes formed from conductive, non-metallic fluid pptd. and hardened on ceramic element |
| 01/19/1994 | EP0478611B1 Wide-range ultrasonic transducer |
| 01/16/1994 | CA2095667A1 Piezo horn with carbon ink electrodes |
| 01/06/1994 | WO1994000835A1 Holder for ultrasonic power converters |
| 01/05/1994 | EP0426761B1 Acoustic field transducers |
| 01/04/1994 | US5276657 Metal-electroactive ceramic composite actuators |
| 12/09/1993 | WO1993024244A1 Underwater acoustic antenna having a surface sensor |
| 12/09/1993 | DE4218653A1 Frequency response modifying appts. for telephone piezoelectric transducer - alters cross=sections of acoustic resonators and apertures for resonance in band between 1.9 and 3 kHz |
| 12/07/1993 | US5268610 Acoustic ink printer |
| 12/02/1993 | DE4233256C1 Schall- oder Ultraschallwandler Sonic or ultrasonic transducer |
| 12/01/1993 | EP0571992A2 Ultrasonic transducer assembly |
| 11/30/1993 | US5267221 Backing for acoustic transducer array |
| 11/25/1993 | WO1993023178A1 Low frequency sonar projector and method |
| 11/11/1993 | WO1993022669A1 High sensitivity sensor |
| 11/11/1993 | DE4215271A1 Ultrasonic transducer with piezoceramic element on ceramic diaphragm - has electrodes on opposite faces of ceramic block supplied from connection pins via soldered wire and internal metallisation of housing. |
| 11/09/1993 | US5260913 Surface wave device |
| 11/04/1993 | DE4312887A1 Capacitive charge storing sensor e.g. chemical or biological substances - forms substance-contacting resonator for generating acoustic waves by transmitter and receiver interdigital structures and membrane separated by dielectric gap without mechanical connection. |
| 10/26/1993 | US5257243 Flexible acoustic array with polymer hydrophones |
| 10/19/1993 | US5254900 Broad beam ultrasonic transducer |
| 10/06/1993 | EP0564239A1 Ultrasonic transducer |
| 10/06/1993 | CN2143391Y High frequency piezoelectric speaker with ball top |
| 10/05/1993 | US5251264 Mechanical-vibration-cancelling piezo ceramic microphone |
| 10/01/1993 | CA2092929A1 Ultrasonic transducer |
| 09/30/1993 | WO1993019561A1 Mechanical-vibration-cancelling piezo ceramic microphone |
| 09/29/1993 | EP0562570A2 Piezoelectric electroacustical transducer |
| 09/21/1993 | US5245734 Multilayer piezoelectric actuator stack and method for its manufacture |
| 09/15/1993 | EP0559963A2 Backing for acoustic transducer array |
| 09/14/1993 | US5245669 Electroacoustic transducer |
| 09/01/1993 | EP0215801B1 Ceramic body with ordered pores |
| 08/31/1993 | US5241235 Twisting actuators |
| 08/31/1993 | US5239736 Method for making piezoelectric composites |
| 08/31/1993 | CA1321829C Ultra-thin acoustic transducer and balloon catheter using same in imaging array subassembly |
| 08/24/1993 | US5239518 Low frequency sonar projector and method |
| 08/18/1993 | CA2061324A1 Warning device for a bicycle |
| 08/17/1993 | US5237543 Moment bender transducer drive |
| 08/11/1993 | EP0555084A2 Improved moment bender transducer |
| 07/27/1993 | US5231659 Telephone handset with transducer assembly |
| 07/21/1993 | EP0551328A1 Piezoelectric component-mounting foil and foil-making method |
| 07/20/1993 | US5229980 Broadband electroacoustic transducer |
| 07/20/1993 | US5229979 Electrostrictive driving device, process for sonic wave projection and polymer materials for use therein |
| 07/20/1993 | US5229744 Piezoelectric type pager |
| 07/14/1993 | EP0550684A1 Acoustic transmitter. |
| 07/13/1993 | CA1320264C Sonar transducers |
| 07/07/1993 | EP0550193A1 Method for ejecting ink droplets in an acoustic ink printer and a piezoelectric transducer for an ink printer |
| 06/22/1993 | CA1319414C Vented-pipe projector |
| 06/10/1993 | WO1993011528A1 Acoustic non-destructive testing |
| 06/08/1993 | US5218575 Acoustic transducer |
| 06/08/1993 | EP0598715A4 Ultrasonic transducer. |
| 05/27/1993 | WO1993010647A1 Ferroelectric composite film acoustic transducer |
| 05/26/1993 | EP0448604A4 Process for producing highly crystalline and homogeneous sub-micron doped and undoped piezoelectric ceramic powders with controlled stoichiometry and particle size |
| 05/12/1993 | EP0540553A1 Composite acoustic system for telephone hand-sets |
| 05/05/1993 | CN2132367Y 压电扬声器 Piezoelectric speaker |
| 05/05/1993 | CN1071794A Electrical interconnection apparatus |
| 04/29/1993 | DE4135408A1 Converting electric energy into vibrations - using piezoelectric effect to translate contraction or expansion to vibration of diaphragm |
| 04/28/1993 | CN2131265Y Iron-casing cone piezoelectric ceramic tweeter |
| 04/20/1993 | US5204844 Moment bender transducer |
| 04/19/1993 | WO1993008649A1 Electroacoustic transducer mounting apparatus |
| 04/15/1993 | WO1993007728A1 Ultrasonic wave probe |
| 04/06/1993 | US5201069 Electroacoustic transducer mounting apparatus |
| 04/06/1993 | CA1315870C Lenseless focussed transducer |
| 04/06/1993 | CA1315869C Contact ultrasonic transducer head |
| 03/24/1993 | EP0532971A1 A progressive electrode for solid state motors |
| 03/23/1993 | US5196755 Acoustic transducer device |
| 03/23/1993 | US5196754 Piezoelectric tone generator and a process for producing it |
| 03/16/1993 | US5195142 Piezoelectric transducer |
| 02/24/1993 | EP0527963A1 Loading of flextensional transducer shells. |
| 02/18/1993 | WO1993002809A1 Ultrasonic transducer arrangement and catheter |
| 02/16/1993 | US5187403 Acoustic image signal receiver providing for selectively activatable amounts of electrical signal delay |
| 02/09/1993 | US5185549 Dipole horn piezoelectric electro-acoustic transducer design |
| 02/03/1993 | EP0335878B1 Echography probe with improved connection circuit |
| 02/02/1993 | US5184332 Multiport underwater sound transducer |
| 01/26/1993 | US5182485 Ultrasonic transducer comprising at least one row of ultrasonic elements |
| 01/20/1993 | EP0332637B1 Probe provided with a concave arrangement of piezoelectric elements for ultrasound apparatus |
| 01/12/1993 | US5178012 Twisting actuator accelerometer |
| 12/30/1992 | EP0520486A2 Blood processing apparatus for treating blood disease |
| 12/29/1992 | US5175709 Ultrasonic transducer with reduced acoustic cross coupling |
| 12/29/1992 | US5174296 Ultrasonic probe having a piezoelectrical element |
| 12/29/1992 | CA2072387A1 Blood processing for treating blood disease |
| 12/09/1992 | EP0517039A1 Piezoelectric ceramic-epoxy composite and method of making same |
| 12/08/1992 | CA1311294C High sensibility tubular piezoelectrical sensor |
| 12/08/1992 | CA1311293C Elastic impulsion generator having the desired predetermined wave shape and its application to medical treatment and diagnosis |