ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,781, issued on April 29, was assigned to FOSTER ELECTRIC COMPANY Ltd. (Tokyo).
"Oscillatory actuator" was invented by Yoshikazu Okazaki (Tokyo), Tatsushi Sasanuma (Tokyo), Takafumi Asukagawa (Tokyo), Yusuke Chiba (Tokyo), Hajime Goto (Tokyo), Akira Hara (Tokyo) and Ken Yamakami (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A weight with optimum weight and high strength can be easily manufactured and the vibration actuator with excellent vibration characteristic is provided. The vibration actuator is formed by a casing 2 with cylindrical shape, a coil 21 provided in the casing 2, and a mover 4 that vibrates along an vibration-axis direction of...