| Patents for H01L 41 - Piezo-electric devices in general; Electrostrictive devices in general; Magnetostrictive devices in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof (34,459) |
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| 08/14/1991 | EP0362213B1 Process for manufacturing a structured ceramic film or a ceramic object composed of such films |
| 08/14/1991 | DE4002254A1 Ultraschallmotor mit zwei rotoren Ultrasonic motor with two rotors |
| 08/13/1991 | US5039901 Electric power source through steam transition |
| 08/13/1991 | US5039899 Piezoelectric transducer |
| 08/13/1991 | US5039894 Magnetostrictive linear motor |
| 08/07/1991 | EP0440491A1 Vibration wave driven motor |
| 08/06/1991 | USH952 Method of preparing a quartz surface for sweeping |
| 08/06/1991 | US5038068 Thin film pattern and method of forming the same |
| 08/01/1991 | DE4002551A1 Piezo-pressure sensor for measurement of press variation - uses polyvinyl-fluoride elastic foil floating in fluid which transfers membrane pressure to foil |
| 07/31/1991 | EP0439327A1 A system and method for controlling a micro-pump |
| 07/31/1991 | EP0438570A1 Method of making a microvalve. |
| 07/30/1991 | US5036419 Electro-mechanical transducing element and a moving device using the same |
| 07/30/1991 | US5036263 Piezoelectric actuator driving apparatus |
| 07/30/1991 | US5036245 Ultrasonic linear motor |
| 07/30/1991 | US5036241 Piezoelectric laminate and method of manufacture |
| 07/30/1991 | US5036240 Impulse sensor with mechanical preamplification and noise cancellation |
| 07/27/1991 | WO1991011850A1 Ultrasonic motor with two rotors |
| 07/27/1991 | CA2049990A1 Ultrasound motor having two rotors |
| 07/25/1991 | DE4003063A1 Conventional valve replacement method - using piezoelectric or ferroelectric material, deformed by applied voltage to open or close holes or slits to modulate fluid flow |
| 07/23/1991 | US5034649 Piezoelectric actuator |
| 07/23/1991 | US5034648 Dual direction switch |
| 07/23/1991 | US5034647 Inchworm type driving mechanism |
| 07/23/1991 | US5034646 Composite resin with filler |
| 07/23/1991 | US5034645 Micro-beam tactile sensor for the measurement of vertical position displacement |
| 07/17/1991 | EP0437319A1 Vibration wave driven motor apparatus |
| 07/17/1991 | EP0437050A1 Vibration wave driven apparatus |
| 07/16/1991 | US5032754 Piezoelectric transducer for an ultrasonic motor |
| 07/16/1991 | US5032753 Piezoelectric transducer and an ultrasonic motor using the piezoelectric transducer |
| 07/16/1991 | US5032558 Lead, magnesium, niobium, titanium doped oxides |
| 07/10/1991 | EP0436336A2 Vibration wave driven apparatus |
| 07/09/1991 | US5030876 Mounting structure for crystal resonator |
| 07/09/1991 | US5030875 Sacrificial quartz crystal mount |
| 07/03/1991 | EP0435653A1 Micropump |
| 07/03/1991 | EP0435496A1 A vibration driven motor and thermal jet type printer using the same |
| 07/02/1991 | US5028936 Pulsed droplet deposition apparatus using unpoled crystalline shear mode actuator |
| 07/02/1991 | US5028833 Ultrasonic motor |
| 07/02/1991 | US5028832 Ultrasonic motor having anisotropic properties |
| 07/02/1991 | US5028455 Method for preparing plzt, pzt and plt sol-gels and fabricating ferroelectric thin films |
| 06/27/1991 | WO1991009428A1 Stepping motor to drive a body, especially a shaft, through small angles of rotation per step |
| 06/26/1991 | EP0434493A1 Method for power increase of electroacoustic low frequency transducers and corresponding transducers |
| 06/26/1991 | EP0434318A2 Low sheet resistance diffused contacts to buried diffused resistors using isolation regions and buried layer |
| 06/25/1991 | USRE33618 Method for initially polarizing and centering a piezoelectric ceramic switching device |
| 06/25/1991 | US5027028 Piezoelectric motor |
| 06/25/1991 | US5027027 Electromechanical translation apparatus |
| 06/22/1991 | WO1991010083A1 A force actuator arrangement |
| 06/22/1991 | WO1991010082A1 A device in a force actuator |
| 06/22/1991 | CA2071990A1 Force actuator arrangement |
| 06/20/1991 | DE4038020A1 Stepper motor turning shaft through small angle - by intermittent drive from flexible connection part carrying piezoelectric element and overcoming spring elements |
| 06/19/1991 | EP0432971A1 Ultra-sonic motor driving circuit |
| 06/19/1991 | EP0432881A1 Vibratory feeding apparatus |
| 06/18/1991 | US5025186 Ultrasonic motor |
| 06/18/1991 | US5024872 Multilayer structure each layer having modulus of elasticity, density, hydrostatic charge sensitivity and permittivity |
| 06/11/1991 | US5023526 Vibratory motor |
| 06/11/1991 | US5023032 Electrostrictive ceramic material including a process for the preparation thereof and applications therefor |
| 06/09/1991 | CA2026017A1 Means and method for nonuniform poling of piezoelectric transducers |
| 06/08/1991 | CA2031697A1 Methods for incrasing the power of low frequency electro-acoustic transducers and transducers using said methods |
| 06/04/1991 | US5021700 Driving apparatus for ultrasonic motor |
| 05/30/1991 | WO1991008594A1 Multi-surface-sensor control unit for a travelling-wave motor |
| 05/30/1991 | CA2045459A1 Multiple-surface sensor control for a traveling wave motor |
| 05/28/1991 | CA1284531C Increased sensitivity piezoelectric hydrophones |
| 05/22/1991 | EP0427981A1 Electrohydraulic or pneumatic actuator |
| 05/22/1991 | EP0427901A1 Method of manufacturing a multilayer piezoelectric actuator stack |
| 05/21/1991 | US5018116 Inter-element mounting for stacked piezoelectric transducers |
| 05/21/1991 | US5017823 Vibration wave driven actuator |
| 05/21/1991 | US5017820 Piezoelectric rotary union system |
| 05/21/1991 | US5017266 Piezoelectric transducer |
| 05/21/1991 | US5016563 Method of manufacturing thin compound oxide film and apparatus for manufacturing thin oxide film |
| 05/21/1991 | US5016333 Method for manufacturing piezoelectric polymer transducers |
| 05/15/1991 | EP0427177A2 Vibrator |
| 05/15/1991 | EP0427163A2 Method and device for linear movement of web and sheet material |
| 05/14/1991 | USRE33587 Method for (prepolarizing and centering) operating a piezoceramic power switching device |
| 05/08/1991 | EP0426466A1 Multilayer piezoelectric composite |
| 05/08/1991 | EP0426042A1 Driving device for ultrasonic motor |
| 05/08/1991 | EP0425954A1 Device for transmission of movement and compressive force |
| 05/08/1991 | CA2029183A1 Method and apparatus for the linear transport of materials in roll and sheet form |
| 05/07/1991 | US5014321 Wide passband omnidirectional loudspeaker |
| 05/07/1991 | US5013982 Circuit for driving ultrasonic motor |
| 05/07/1991 | US5013958 X-Y stage with ultrasonic actuator |
| 05/07/1991 | US5013956 Wear resistance |
| 05/07/1991 | US5013955 Drive system of actuator having piezoelectric device for use in motor vehicle |
| 05/07/1991 | US5013945 Linearly operating motor |
| 05/07/1991 | US5012835 Nozzle flapper mechanism |
| 05/02/1991 | EP0424609A1 Piezoelectric actuator |
| 05/01/1991 | CN1051106A Ferroelectric ceramics |
| 05/01/1991 | CN1012544B Annular triple-lamina piezoelectric supersonic vibrator and its clamping supersonic micromotion motor |
| 05/01/1991 | CN1012543B Piezoelectric transduce with multiple sensitive coaxial elements |
| 04/24/1991 | EP0424362A2 Process for lowering the water content of piezoelectric GaPO4 crystal elements and crystals produced thereby |
| 04/24/1991 | EP0424141A2 Drive control circuit for an ultra-sonic stepping motor |
| 04/24/1991 | EP0424140A2 Electronic timepiece |
| 04/24/1991 | EP0424139A2 Ultrasonic motor |
| 04/24/1991 | EP0423822A1 Ferroelectric ceramics |
| 04/24/1991 | EP0423308A1 PVdF/TrFE PIEZOELECTRIC TRANSDUCER |
| 04/23/1991 | USRE33577 Advanced piezoceramic power switching devices employing protective gastight enclosure and method of manufacture |
| 04/23/1991 | US5010222 Driving device for ultrasonic wave motor |
| 04/18/1991 | WO1990016087A3 Piezoelectric device with air-filled kerf |
| 04/17/1991 | EP0422702A2 Magnetoelastic torque transducer |
| 04/16/1991 | US5008581 Piezoelectric revolving resonator and single-phase ultrasonic motor |
| 04/10/1991 | CN1050647A Method of producing torque-transmitter shaft |
| 04/09/1991 | USRE33568 Piezoelectric ceramic switching devices and systems and methods of making the same |
| 04/09/1991 | US5006749 Method and apparatus for using ultrasonic energy for moving microminiature elements |