| Patents for H04R 17 - Piezo-electric transducers; Electrostrictive transducers (7,213) |
|---|
| 02/12/1980 | CA1071750A1 Transducer having piezoelectric film arranged with alternating curvatures |
| 02/06/1980 | EP0007436A1 Electro-acoustic transducer with a membrane having a piezoelectric layer |
| 02/06/1980 | EP0007435A1 Electro-acoustic transducer |
| 01/29/1980 | US4186323 Piezoelectric high polymer, multilayer electro-acoustic transducers |
| 01/23/1980 | EP0007308A1 Ultrasonic wave energy electronic b-scan imaging apparatus |
| 01/23/1980 | EP0007036A1 Electroacoustic transducer |
| 01/15/1980 | US4184093 Piezoelectric polymer rectangular flexural plate hydrophone |
| 01/09/1980 | EP0006624A2 Method for manufacturing ultrasonic transducers |
| 01/09/1980 | EP0006623A2 Ultrasonic transducer |
| 01/08/1980 | US4183007 Ultrasonic transceiver |
| 01/08/1980 | US4182937 Mechanically biased semiconductor strain sensitive microphone |
| 12/25/1979 | US4180792 Transmit-receive transducer array and ultrasonic imaging system |
| 12/11/1979 | CA1067993A1 Piezoelectric transducers |
| 11/27/1979 | CA1067199A1 Transducer device for found waves with automatic compensation |
| 11/20/1979 | CA1066798A1 Vibration detecting device and a method for adapting the same |
| 11/14/1979 | EP0005265A2 Method for making contact on the adhesive side of the electrode of an electrical device |
| 11/13/1979 | CA1066345A1 Linear piezoelectric actuator with liner controlling frictional wear |
| 10/23/1979 | CA1065047A1 Ultrasonic ceramic microphone |
| 10/23/1979 | CA1065046A1 Acceleration balanced hydrophone |
| 10/09/1979 | US4170769 Audio-detector alarm |
| 10/09/1979 | US4170742 Piezoelectric transducer with multiple electrode areas |
| 10/09/1979 | US4170185 Preventing marine fouling |
| 09/25/1979 | US4169276 Drive circuit for controlling a movable magnetic head |
| 08/28/1979 | US4165961 Burner with ultrasonic vibrator |
| 08/07/1979 | US4163966 Rodent repellor |
| 08/07/1979 | CA1060120A1 Sonic transducer |
| 07/31/1979 | US4163168 Two-directional piezoelectric driven fine adjusting device |
| 07/24/1979 | US4162111 Piezoelectric ultrasonic transducer with damped housing |
| 06/28/1979 | WO1979000372A1 Ultrasonic wave energy electronic b-scan imaging apparatus |
| 05/30/1979 | EP0002161A2 Piezo-electric transducing device and process for its manufacture |
| 05/29/1979 | US4156824 Composite low frequency transducer |
| 05/29/1979 | US4156800 Piezoelectric transducer |
| 05/22/1979 | US4156158 Double serrated piezoelectric transducer |
| 05/22/1979 | US4156156 Method for reducing the resonant frequency of a piezoelectric transducer |
| 04/17/1979 | US4150262 Piezoelectric bone conductive in ear voice sounds transmitting and receiving apparatus |
| 03/06/1979 | CA1050155A1 Device for converting electric into acoustic vibrations and vice versa, provided with a diaphragm, comprising at least one layer of a piezoelectric polymer material |
| 02/20/1979 | US4140022 Acoustic imaging apparatus |
| 02/06/1979 | US4137991 Clamped acoustic elastic wave generator |
| 01/16/1979 | US4135109 High powered piezoelectric cylindrical transducer with threads cut into the wall |
| 01/16/1979 | CA1046625A1 Semiconductor piezoresistive strain transducer |
| 01/02/1979 | CA1045559A1 Phonograph pick-up with plurality of piezoelectric elements |
| 12/12/1978 | US4129799 Phase reversal ultrasonic zone plate transducer |
| 12/05/1978 | US4128841 Droplet microphone |
| 11/28/1978 | US4127749 Microphone capable of cancelling mechanical generated noise |
| 11/14/1978 | CA1042386A1 Method for continuously polarizing thermoplastic film |
| 11/07/1978 | US4124829 Electromechanical filter |
| 10/24/1978 | US4122365 Piezoelectric buzzer device |
| 09/26/1978 | CA1039415A1 Method for producing thermoplastic film electric element |
| 07/18/1978 | US4101795 Ultrasonic probe |
| 07/11/1978 | US4100527 Multi-driver piezoelectric transducers with single counter-masses, and sonar antennas made therefrom |
| 06/06/1978 | US4093884 Thin structures having a piezoelectric effect, devices equipped with such structures and in their methods of manufacture |
| 05/09/1978 | US4088915 Curved polymeric piezoelectric electro-acoustic transducer |
| 05/02/1978 | US4087716 Multi-layer element consisting of piezoelectric ceramic laminations and method of making same |
| 04/18/1978 | US4085349 Piezo electric transducer for measuring instantaneous vibration velocity |
| 03/14/1978 | US4079213 Piezoelectric transducer having improved low frequency response |
| 03/07/1978 | US4078160 Piezoelectric bimorph or monomorph bender structure |
| 02/14/1978 | US4074224 Acoustic wave transducer with automatic compensation of the static pressure variations |
| 01/10/1978 | US4068209 Electroacoustic transducer for deep submersion |
| 12/27/1977 | US4065687 Supersonic vibrator with means for detecting vibrating speed |
| 12/20/1977 | US4064375 Vacuum stressed polymer film piezoelectric transducer |
| 12/13/1977 | US4063049 Piezoelectric electroacoustic transducer |
| 11/08/1977 | US4057660 Method for producing thermoplastic film electric element |
| 11/01/1977 | US4056742 Transducer having piezoelectric film arranged with alternating curvatures |
| 11/01/1977 | US4056741 Audible signal generating apparatus having selectively controlled audible output |
| 10/18/1977 | US4054808 Vibration detecting device having a piezoelectric ceramic plate and a method for adapting the same for use in musical instruments |
| 10/11/1977 | US4053721 Piezoelectric type pickup cartridge for stereo with pressing and intermediate members for coupling |
| 10/04/1977 | US4052627 Ultrasonic ceramic microphone |
| 09/27/1977 | US4051395 Weight actuated piezoelectric polymeric transducer |
| 09/13/1977 | US4048454 Sonic transducer employing rigid radiating member |
| 09/06/1977 | US4047060 Acoustic transducer with elastomeric coupling |
| 08/30/1977 | US4045695 Piezoelectric electro-acoustic transducer |
| 08/23/1977 | US4044297 Ultrasonic generator with combined oscillator and current regulator |
| 08/23/1977 | US4044273 Ultrasonic transducer |
| 08/02/1977 | US4039823 Method for processing work pieces, for transmitting and processing information by means of laser emission and apparatus for performance of the method |
| 07/12/1977 | US4035672 Acoustic transducer with a dual purpose piezoelectric element |
| 06/21/1977 | US4031503 Anti-corrosion ultrasonic transducer |
| 06/21/1977 | US4031418 Low frequency acoustical piezo-electric transducer |
| 06/21/1977 | US4030175 Method of making a metal enclosed transducer assembly |
| 06/07/1977 | US4028566 Electroacoustic conversion device having a diaphragm comprising at least one of a piezoelectric polymer material |
| 05/31/1977 | US4027115 Electroacoustic sound generator |
| 05/24/1977 | US4025890 Semiconductor piezoresistive strain transducer |
| 05/17/1977 | US4024355 Piezoelectric electro-acoustic transducer with non-uniform backing |
| 05/10/1977 | US4023162 Electronic buzzer |
| 03/22/1977 | US4013992 Diver's piezoelectric microphone with integral agc preamplifier |
| 03/15/1977 | US4012604 Microphone for the transmission of body sounds |
| 02/15/1977 | US4008408 Piezoelectric electro-acoustic transducer |
| 02/01/1977 | US4006371 Electroacoustical transducer comprising piezoelectric element |
| 01/18/1977 | US4004165 Ultrasonic signal generators |
| 12/14/1976 | US3997804 Mounting for flexible diaphragm piezoelectric transducer |
| 11/02/1976 | US3990023 Elastic surface wave device |
| 11/02/1976 | US3989965 Acoustic transducer with damping means |
| 11/02/1976 | US3989963 Control circuits for piezo electric transducers |
| 10/19/1976 | US3987377 Elastic surface wave propagation device |
| 10/12/1976 | US3985914 Method for continuously polarizing thermoplastic film |
| 10/12/1976 | US3984903 Method of spanning across a frame a high-molecular-weight piezoelectric element |
| 09/21/1976 | US3982143 Piezoelectric diaphragm electro-acoustic transducer |
| 09/14/1976 | US3980904 Elastic surface wave device |
| 09/07/1976 | US3979565 Metal enclosed transducer assembly |
| 08/31/1976 | US3978353 Piezoelectric acoustic speaker system |
| 08/24/1976 | US3976897 Piezoelectric electro-acoustic diaphragm transducer with composite resilient backing |