| Patents for H04R 17 - Piezo-electric transducers; Electrostrictive transducers (7,213) |
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| 05/03/1988 | US4742264 Piezoelectric sound generator |
| 04/27/1988 | EP0264557A2 Piezoelectric sound transducer |
| 04/14/1988 | DE3634619A1 Arrangement for protecting against voltage flash-over in telephony handsets |
| 04/14/1988 | DE3634484A1 Transducer plate for piezoelectric transducers |
| 04/12/1988 | US4736631 Ultrasonic probes |
| 04/06/1988 | EP0262145A1 Piezoelectric polymeric film balloon speaker |
| 04/06/1988 | CN85103008B Nonbarrierboard one-direction low-frequency wide-band high-pressure transducer |
| 03/29/1988 | US4734611 Ultrasonic sensor |
| 03/22/1988 | US4733379 Line array transducer assembly |
| 03/16/1988 | EP0260173A1 Piezo-electric hydrophones with improved sensitivity |
| 03/10/1988 | DE3630598A1 Electroacoustic transducer |
| 03/09/1988 | EP0258948A2 Flexural dish resonant cavity transducer |
| 03/01/1988 | US4728843 Ultrasonic vibrator and drive control method thereof |
| 02/24/1988 | EP0256202A2 Coupling body for a shockwave-therapeutic apparatus |
| 02/16/1988 | US4725989 Method controlling the focusing of an ultrasonic field and apparatus for performing said method |
| 02/10/1988 | EP0255636A1 Acoustic shock wave sensor |
| 02/09/1988 | CA1232672A1 Broadband radial vibrator transducer with multiple resonant frequencies |
| 01/20/1988 | CN87204016U Ultrasonic wave energy converter for air |
| 01/07/1988 | EP0251901A1 Continuous piezoelectric pressure wave receiver and method for its manufacture |
| 01/07/1988 | EP0251599A2 Acoustic transducer |
| 12/23/1987 | DE3620557A1 Electroacoustic transducer |
| 12/15/1987 | CA1230409A1 Ultrasonic transducer arrangement comprising a network of piezoelectric transducer elements |
| 12/03/1987 | WO1987007218A1 Piezoelectrically operated fluid pump |
| 12/03/1987 | DE3618106A1 Piezoelektrisch betriebene fluidpumpe Piezoelectric driven fluid pump |
| 12/01/1987 | CA1229907A1 Electroacoustic transducer with a piezoelectric diaphragm |
| 11/24/1987 | US4709361 Flexural disk transducer |
| 11/24/1987 | US4709359 End weighted reed sound transducer |
| 11/10/1987 | US4706229 Electroacoustic transducer |
| 11/10/1987 | US4705981 Ultrasonic transducer |
| 11/10/1987 | US4705980 Drive control method of ultrasonic vibrator |
| 11/10/1987 | US4704774 Ultrasonic transducer and method of manufacturing same |
| 11/05/1987 | WO1987006790A1 Ultrasonic transducer |
| 11/04/1987 | EP0243591A2 Underwater transducer |
| 10/27/1987 | US4703214 Ultrasonic vibrator and its drive control method |
| 10/21/1987 | CN87202351U Ultrasonic transducer |
| 10/20/1987 | US4701749 Electroacoustic calling device with universal bearing supporting a sound aperture closure member |
| 10/13/1987 | US4700396 Sound-wave receiving appliance |
| 10/13/1987 | US4700177 Sound generating apparatus with sealed air chamber between two sounding plates |
| 10/13/1987 | US4700100 Flexural disk resonant cavity transducer |
| 10/13/1987 | US4699150 Ultrasonic transducer assembly for medical diagnostic examinations |
| 10/13/1987 | CA1228151A1 Piezoelectric coaxial cable having a helical inner conductor |
| 09/30/1987 | EP0239167A1 Apodized ultrasonic echograph provided with a linear array of piezoelectric transducers, and method of making such an array |
| 09/29/1987 | US4697283 Telephone handset with integrated flux coil |
| 09/29/1987 | US4697117 Rotary ultrasonic motor |
| 09/24/1987 | WO1987005773A1 Flextensional transducers |
| 09/24/1987 | WO1987005772A1 Sonar transducers |
| 09/24/1987 | WO1987005748A1 Piezoelectric polymeric film balloon speaker |
| 09/23/1987 | EP0237616A2 Line array transducer assembly |
| 09/22/1987 | US4695988 Underwater piezoelectric arrangement |
| 09/16/1987 | CN86210358U High-frequency piezoelectrical paper cone formed loudspeaker |
| 09/15/1987 | US4694440 Underwater acoustic wave transmitting and receiving unit |
| 09/12/1987 | CN86204001U Miniature ultrasonic sensor |
| 09/08/1987 | US4692942 Electroacoustic transducer with piezoelectric diaphragm |
| 09/08/1987 | US4692654 Ultrasonic transducer of monolithic array type |
| 09/08/1987 | US4692653 Acoustic transducers utilizing ZnO thin film |
| 09/08/1987 | US4692650 Vibration wave motor |
| 08/25/1987 | US4689773 For immersion in an external acoustic transmission medium |
| 08/25/1987 | CA1226076A1 Phased array transducer construction |
| 08/11/1987 | US4686409 Porous adaptation layer in an ultrasonic applicator |
| 08/11/1987 | CA1225468A1 Method of fabricating composite electrical transducers |
| 08/05/1987 | EP0230562A1 Method for preparing piezo-ceramic membranes |
| 07/29/1987 | EP0229981A1 Method for controlling the focussing characteristics of an ultrasonic field and device for carrying out said method |
| 07/28/1987 | US4683161 Transducers |
| 07/15/1987 | EP0228832A1 Support member for pressure sensor |
| 07/08/1987 | EP0227985A2 Ultrasonic sensor |
| 06/30/1987 | US4677337 Broadband piezoelectric ultrasonic transducer for radiating in air |
| 06/30/1987 | US4677336 Piezoelectric transducer and process for its production |
| 06/24/1987 | EP0226224A2 Electromechanical transducer |
| 06/24/1987 | CN85108268A Piezo-electric loudspeaker |
| 06/23/1987 | US4674161 Connection method for piezo-electric acoustic transducers in electro-acoustic capsules |
| 06/23/1987 | CA1223331A1 Method and apparatus for a phased array transducer |
| 06/18/1987 | WO1987003699A1 Support member for pressure sensor |
| 06/16/1987 | EP0225798A2 Acoustic transducer |
| 06/09/1987 | US4672591 Ultrasonic transducer |
| 06/02/1987 | US4670074 Lamination in presence of electric field; electro conductivit y |
| 05/20/1987 | EP0222276A2 Ultrasonic measuring head |
| 05/06/1987 | EP0220959A2 Ceramic electronic device and method of manufacturing the same |
| 04/23/1987 | DE3536502A1 Piezoelectric treble speaker without frame |
| 04/07/1987 | US4656384 Ultrasonic detection sensor in hybrid structure with appertaining electronic circuit |
| 04/01/1987 | EP0216326A2 Electroacoustic transducer |
| 03/31/1987 | US4654554 Piezoelectric vibrating elements and piezoelectric electroacoustic transducers |
| 03/24/1987 | US4652702 Ear microphone utilizing vocal bone vibration and method of manufacture thereof |
| 03/19/1987 | DE3630368A1 Vibration transducer and method for manufacturing it |
| 03/17/1987 | US4651044 Electroacoustical transducer |
| 03/17/1987 | US4651043 Resonator exhibiting uniform motional output |
| 02/04/1987 | EP0210214A1 Electro-mechanical transducer |
| 02/03/1987 | US4641054 Piezoelectric electro-acoustic transducer |
| 02/03/1987 | CA1217554A1 Ultrasonic diagnostic imaging systems for varying depths of field |
| 01/21/1987 | EP0209238A2 Double piston acoustic transducer with selectable directivity |
| 01/20/1987 | US4638207 Piezoelectric polymeric film balloon speaker |
| 01/20/1987 | US4638206 Sheet-like piezoelectric element |
| 01/17/1987 | CN85102335A Composite ultrasonic transducers and methods for making the same |
| 01/13/1987 | US4636585 Telephone installations |
| 01/13/1987 | US4635483 Driving control method of ultrasonic transducer |
| 12/30/1986 | EP0206425A2 Extendible sonobuoy apparatus |
| 12/23/1986 | US4631436 Transducer plate for piezoelectric transducers |
| 12/16/1986 | US4629928 Electrode terminal structure for a piezoelectric polymer |
| 12/16/1986 | US4628573 Process for producing array-type ultrasonic probe |
| 12/09/1986 | US4628223 Composite ceramic/polymer piezoelectric material |
| 12/09/1986 | CA1215163A1 Electro-acoustic calling devices |