ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,453,843, issued on Oct. 28, was assigned to ASAHI INTECC Co. LTD. (Seto, Japan).
"Dilator" was invented by Yukihiro Fuseya (Seto, Japan), Hideaki Maki (Seto, Japan), Daiki Takahashi (Seto, Japan), Akira Sawai (Seto, Japan) and Marina Tsuzuku (Seto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dilator includes a shaft in a hollow shape whose distal end has a smaller outer diameter than the proximal end, and a connector on the proximal end of the shaft. A spirally-arranged protruding portion on an outer peripheral face of the shaft has gaps between neighboring sections along an axis of the shaft. The shaft has a first location and a second locat...