ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,206, issued on Feb. 24, was assigned to ZENITHINGS SHENZHEN Co. LTD. (Shenzhen, China).
"Dental floss device" was invented by Zhi Chen (Shenzhen, China), Xi Wang (Shenzhen, China) and Zhen Liu (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dental floss device, which includes a shell, a floss supply box, and a drive device; the floss supply box includes a box arranged in an accommodating cavity of the shell; a floss supply assembly mounted in the box, the floss supply assembly is capable of recovering an used floss and releasing an unused floss under driving of the drive device; a floss holder, one end of the floss holder is connec...