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| Number | Title | Issue Date |
| 4012647 | Ultrasonic motors and converters The invention discloses various embodiments of an ultrasonic motor and converter adapted to be used in home or industrial ultrasonic devices. The ultrasonic motor is generally of a piezoelectric material having a removable tip or of a design in which the ... | 03/15/1977 |
| 3980906 | Ultrasonic motor-converter systems Ultrasonic systems for use in consumer, and other applications, having electromechanical motor systems providing bursts of ultrasonic mechanical vibration at an applicator repeated at a sonic frequency to produce both ultrasonic and sonic vibratory motion... | 09/14/1976 |
| 3941424 | Ultrasonic toothbrush applicator This invention relates to the method of manufacturing a toothbrush adapted to be mounted on an automatic toothbrush power handle, and having as a power source vibratory energy in the ultrasonic range. The manufacturing process includes that of providing a... | 03/02/1976 |
