| Cedrat Recherche: Ultrasonic linear piezo motors, drives and actuators. Also dedicated piezo transducer software for motor design. |
| Cranfield University - Nanotechnology: Piezoelectric materials, motors, microsystems (MEMS) and actuator design. |
| Flexmotor - Motors and Micromotors: Innovative piezoelectric ultrasonic motor and micromotors for low cost, high volume manufacture for automotive, MEMS and consumer products. Low profile piezomotor and scalable to 2mm diameter. |
| Institute of Piezomechanics: Ultrasonic actuator and motor research in Kaunas, Lithuania from 1970. Multi degree of freedom motors for robotics. |
| MicroPropulsion Corp (USA): Ultrasonic motors, piezoelectric transformers, miniature generators. |
| Piezo Ceramic GmbH (Germany): Ultrasonic motor manufacturer. Also piezo ceramic, PZT transducers & actuators. |
| Piezoelectric Products: EDO Ceramics Corp supplying transducers, actuator and a linear ultrasonic motor |
| Shinsei Ultrasonic Motors: First commercial manufacturer of rotary travelling wave ultrasonic motors since 1986. |
| Surface Acoustic Wave Linear Motor: SAW linear motors. Article describing the principle, experiment and conclusions and future reading. |
| Ultrasonic Motors: JPL's NDEAA Group work for space application of piezo devices up to year 2000 including commercially available motors. |
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