| Patents for H02N 2 - Electric machines in general using piezo-electric effect, electrostriction or magnetostriction (14,251) |
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| 04/20/1982 | US4325264 Supersonic vibration driven motor device |
| 02/09/1982 | US4315180 High voltage piezoelectric generating device with lengthened spark time |
| 01/05/1982 | CA1115813A1 Piezoelectric wafer mover |
| 12/29/1981 | CA1115415A1 Drive circuit for controlling a movable magnetic head |
| 11/24/1981 | US4302694 Composite piezoelectric tuning fork with eccentricly located electrodes |
| 10/27/1981 | US4297609 High-voltage generating device |
| 09/23/1981 | EP0036187A1 Head readjustment assembly for a video tape recorder |
| 09/22/1981 | US4291274 Phase detector circuit using logic gates |
| 07/07/1981 | US4277710 Control circuit for piezoelectric ultrasonic generators |
| 06/23/1981 | US4275363 Method of and apparatus for driving an ultrasonic transducer including a phase locked loop and a sweep circuit |
| 05/12/1981 | US4267478 Pathlength controller for a ring laser gyroscope |
| 04/21/1981 | US4263527 Charge control of piezoelectric actuators to reduce hysteresis effects |
| 02/03/1981 | US4249100 Drive means and force control for piezoelectric vibration motor |
| 12/02/1980 | US4237399 Driving circuit for piezo-electric multimorph transducer |
| 10/29/1980 | EP0017921A1 Piezoelectric-drive system, especially for focussing systems |
| 10/14/1980 | US4227608 Method and an arrangement for obtaining a translatory movement between two mutually contacting bodies |
| 09/23/1980 | US4223998 Piezo-electric actuating element for recording heads |
| 08/26/1980 | US4219755 Electromotive actuator |
| 07/01/1980 | US4210837 Piezoelectrically driven torsional vibration motor |
| 05/27/1980 | US4204757 Flash lamp operating mechanism |
| 05/14/1980 | EP0010983A1 Positioning apparatus |
| 03/25/1980 | US4195243 Piezoelectric wafer mover |
| 03/25/1980 | CA1074435A1 Ultrasonic generator |
| 02/12/1980 | CA1071749A1 Piezo-electric actuating element for a recording head |
| 09/25/1979 | US4169276 Drive circuit for controlling a movable magnetic head |
| 07/03/1979 | US4160184 Piezoelectric actuator for a ring laser |
| 07/03/1979 | CA1057846A1 Piezoelectric stack insulation |
| 06/12/1979 | US4158117 Pressure sensitive switch |
| 05/29/1979 | US4156825 Piezoelectric high voltage generating device |
| 05/22/1979 | CA1055146A1 High power piezoelectric bender |
| 09/19/1978 | US4115036 Pump for pumping liquid in a pulse-free flow |
| 08/22/1978 | US4109174 Drive circuits for a piezoelectric stack |
| 08/22/1978 | CA1037090A1 Prestressed glass piezoelectric power source |
| 08/08/1978 | US4106065 Drive circuitry for controlling movable video head |
| 06/06/1978 | US4093885 Transducer assembly vibration sensor |
| 05/23/1978 | US4091302 Portable piezoelectric electric generating device |
| 11/29/1977 | US4060741 High power piezoelectric bender |
| 09/27/1977 | US4051396 Encapsulation to prevent fracture of piezoelectric high voltage mechanism |
| 08/23/1977 | US4044350 Electromechanical transducer for relief display panel |
| 08/23/1977 | US4044297 Ultrasonic generator with combined oscillator and current regulator |
| 04/19/1977 | US4019073 Piezoelectric motor structures |
| 01/25/1977 | US4005319 Piezoelectric generator operated by fluid flow |
| 11/16/1976 | US3992640 Piezo crystal housing and mount |
| 11/09/1976 | US3991410 Analog storage circuit including a piezoelectric element |
| 10/05/1976 | US3984738 Piezoelectric igniter for lighters |
| 08/24/1976 | US3976898 Prestressed glass, aezoelectric electrical power source |
| 08/03/1976 | US3973150 Rectangular, oriented polymer, piezoelectric diaphragm |
| 05/18/1976 | US3957162 Method and device for displacement of a workpiece |
| 02/24/1976 | US3940637 Polymeric piezoelectric key actuated device |
| 02/03/1976 | US3936678 Magnetically latched piezoelectric striking igniter |
| 01/27/1976 | US3935485 Piezoelectric key board switch |