ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,306, issued on April 29, was assigned to NAKANISHI INC. (Kanuma, Japan).
"Dental handpiece and dental handpiece with cleaning adapter" was invented by Shinichi Tanaka (Kanuma, Japan), Tomohiro Sakanushi (Kanuma, Japan) and Kohei Sekizuka (Kanuma, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dental handpiece includes a cylindrical outer body, an insert body that includes an ultrasonic vibrator, and is accommodated in the outer body, a front end portion of the insert body and a rear end portion of the insert body, a tip connection portion that detachably holds a scale tip to which ultrasonic vibration from the ultrasonic vibrator is transmitt...