ALEXANDRIA, Va., June 16 -- United States Patent no. 12,302,987, issued on May 20, was assigned to NASYU Co. LTD. (Owariasahi, Japan).
"Shoe insole" was invented by Tomokazu Nasu (Owariasahi, Japan), Keiichi Sakai (Owariasahi, Japan) and Naoji Sakai (Owariasahi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A shoe insole having a protruding portion for stimulating the plantar side of a foot, and both shoe insole surfaces are used. The insole contains: a flat plate-shaped base portion made of a flexible material; and a protruding portion from at least one of the first and second insole surfaces and stimulates the plantar side of a foot. The first and second insole surfaces stimulate the same portion of...