| Patents for H04R 19 - Electrostatic transducers (5,387) |
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| 09/25/1984 | CA1175136A1 Cell assembly for electret transducer |
| 08/30/1984 | WO1984003410A1 Integrated capacitive transducer |
| 08/28/1984 | CA1173552A1 Electret transducer |
| 08/21/1984 | US4467394 Three plate silicon-glass-silicon capacitive pressure transducer |
| 08/15/1984 | EP0115908A2 Transducer |
| 07/24/1984 | US4461931 Frequency response equalizing network for an electrostatic loudspeaker |
| 07/10/1984 | CA1170758A1 Flexible tape electroacoustic transducer using an electret |
| 07/03/1984 | US4458161 Electret device |
| 07/03/1984 | CA1170189A1 Microphone output transmission circuit |
| 06/26/1984 | US4456796 Unidirectional electret microphone |
| 06/19/1984 | CA1169359A1 Step-up circuit for driving full-range-element electrostatic loudspeakers |
| 05/15/1984 | US4449236 Anti-side tone transmitter |
| 05/09/1984 | EP0107843A1 Acceleration vibration detector |
| 05/01/1984 | CA1166767A1 Process for manufacturing electromechanical transducers using at least one polymer film and a device for implementing said process |
| 04/26/1984 | WO1984001683A1 Diaphragm stretching apparatus |
| 04/26/1984 | WO1984001678A1 Amplifier circuit |
| 04/17/1984 | US4443666 Electret microphone assembly |
| 04/17/1984 | CA1165859A1 Electret microphone shield |
| 04/10/1984 | US4442324 Encapsulated backplate for electret transducers |
| 04/10/1984 | US4442323 Microphone with vibration cancellation |
| 03/27/1984 | US4439642 High energy ultrasonic transducer |
| 03/27/1984 | US4439641 Ultrasonic transducer for use in a vibratory environment |
| 03/27/1984 | CA1164241A1 Capacitive pressure transducer assembly with improved output lead design |
| 03/13/1984 | US4436648 Electret microphones |
| 03/07/1984 | EP0102069A2 Vibration analyzing device |
| 02/28/1984 | US4434327 Electret transducer with variable actual air gap |
| 02/21/1984 | US4432237 Ultrasonic transducer |
| 02/16/1984 | WO1984000662A1 Electroacoustic transducer |
| 02/14/1984 | US4430790 Method of making superconducting devices as defined |
| 01/31/1984 | US4429193 Electret transducer with variable effective air gap |
| 01/31/1984 | US4429192 Electret transducer with variable electret foil thickness |
| 01/31/1984 | US4429191 Electret transducer with variably charged electret foil |
| 01/31/1984 | US4429190 Continuous strip electret transducer array |
| 01/31/1984 | US4429189 Electret transducer with a selectively metalized backplate |
| 01/03/1984 | US4424419 Electret microphone shield |
| 12/28/1983 | EP0096778A2 Microphone |
| 12/13/1983 | US4420790 High sensitivity variable capacitance transducer |
| 12/06/1983 | US4419545 Electret transducer |
| 11/29/1983 | US4418246 Cell assembly for electret transducer |
| 11/15/1983 | US4415948 Electrostatic bonded, silicon capacitive pressure transducer |
| 11/08/1983 | US4414433 Microphone output transmission circuit |
| 11/02/1983 | EP0092822A2 Ear microphone |
| 10/11/1983 | US4409441 Ultrasonic transducer for use in a vibratory environment |
| 10/04/1983 | US4407852 Volumetric space charge |
| 09/13/1983 | US4403382 Process for manufacturing electromechanical transducers using at least one polymer film |
| 09/06/1983 | US4403117 Sonic transducer having diaphragm tensioning spring directly attached to diaphragm |
| 08/30/1983 | US4401858 Method for controlling wrinkles in a vibratile diaphragm |
| 08/23/1983 | US4400634 Bimorph transducer made from polymer material |
| 08/16/1983 | CA1152205A1 Telephone transmitter including an electret transducer |
| 08/03/1983 | EP0084608A1 Electrostatic acoustical transducer |
| 07/26/1983 | CA1150816A1 Method and apparatus for implanting a charge in an electret foil |
| 07/19/1983 | CA1150393A1 Electrostatic transducer backplate having open ended grooves |
| 07/12/1983 | CA1149928A1 Electrostatic loudspeaker |
| 07/05/1983 | US4392025 Condenser microphone |
| 06/21/1983 | US4389580 Flexible tape electroacoustic transducer using an electret |
| 05/24/1983 | US4385209 Adjustment of operating characteristics of a telephone transmitter including an electret transducer |
| 05/10/1983 | US4383139 Electrostatic acoustic converter |
| 05/10/1983 | US4382328 Method of making stationary electrodes for electrostatic transducers |
| 05/03/1983 | US4382196 Tape transducer |
| 04/27/1983 | EP0077615A1 Electret microphone shield |
| 04/14/1983 | WO1983001362A1 Lead-frame for an electret microphone |
| 04/12/1983 | US4380041 Capacitor pressure transducer with housing |
| 04/12/1983 | CA1144387A1 Capacitive pressure transducer |
| 03/15/1983 | CA1143049A1 Electrostatic transducer having optimum sensitivity and damping |
| 03/09/1983 | EP0073682A1 Electroacoustical transducer for use in a vibratory environment and a method of making same |
| 02/16/1983 | EP0072289A2 Electro-acoustic transducer with intrinsically polarized dielectric capacitor |
| 02/09/1983 | EP0057215A4 Improved step-up circuit for driving full-range-element electrostatic loudspeakers. |
| 02/08/1983 | CA1141020A1 Electrets from plasma polymerized material |
| 12/28/1982 | US4366494 Josephson junction and a method of making the same |
| 12/21/1982 | CA1138090A1 Method and device for controlling wrinkles in a vibratile diaphragm |
| 12/15/1982 | EP0066713A1 An electroacoustical transducer and a method for assembling same |
| 12/01/1982 | EP0065810A2 Travelling wave electrical/acoustic transducer system and a microphone and loudspeaker incorporating such a system |
| 12/01/1982 | EP0065746A2 Condenser microphone |
| 11/30/1982 | US4361735 Electret microphone circuit |
| 11/30/1982 | US4360955 Method of making a capacitive force transducer |
| 11/16/1982 | CA1135829A1 Acoustic electrical conversion device with at least one capacitor electret element connected to an electronic circuit |
| 10/26/1982 | US4356049 Lamination of conductor and dielectric polymer film, pressure deformation with jig |
| 09/07/1982 | US4348711 Method and apparatus for implanting a charge in an electret foil |
| 08/17/1982 | US4345299 Capacitive pressure transducer assembly with improved output lead design |
| 08/17/1982 | US4344807 For use in electrostatic speaker element |
| 08/11/1982 | EP0057215A1 Improved step-up circuit for driving full-range-element electrostatic loudspeakers |
| 07/27/1982 | CA1128644A1 Capacitor microphone |
| 07/07/1982 | EP0055650A1 Circuit for connecting an active microphone, in particular with an electret, to a telephone transmission circuit |
| 06/29/1982 | CA1126851A1 Electret transducer backplate, electret transducer and method of making an electret transducer |
| 05/25/1982 | US4331840 Electret transducer with tapered acoustic chamber |
| 05/11/1982 | US4329732 Precision capacitance transducer |
| 05/11/1982 | US4329547 Dual section electret microphone |
| 05/05/1982 | EP0050649A1 Speaker with low mass driver |
| 04/27/1982 | CA1122722A1 Method of manufacturing an electret device |
| 04/07/1982 | EP0048902A2 Method for manufacturing electret device and condenser type electro-acoustic transducer having electrets |
| 04/06/1982 | US4323736 Step-up circuit for driving full-range-element electrostatic loudspeakers |
| 03/23/1982 | US4321432 Electrostatic microphone |
| 03/09/1982 | CA1119710A1 Electrostatic transducer having narrowed directional characteristic |
| 03/04/1982 | WO1982000745A1 Back plate for condenser microphone and structure thereof |
| 02/18/1982 | WO1982000559A1 Improved step-up circuit for driving full-range-element electrostatic loudspeakers |
| 02/16/1982 | US4316062 Electrostatic electroacoustic transducer |
| 02/09/1982 | CA1118090A1 Electromechanical transducers using an electret |
| 01/19/1982 | US4311881 Electrostatic transducer backplate having open ended grooves |
| 12/29/1981 | US4308431 Speaker with low mass driver |
| 12/16/1981 | EP0041886A1 Capacitive pressure transducer |