ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,024, issued on March 25, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).
"Extension-retraction device" was invented by Takeo Shirabe (Susono, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A telescopic device includes a telescopic tubular structure and an inner guide member. The outer belt and the inner belt of the tubular structure are provided with a plurality of protrusions and holes provided in two rows in the longitudinal direction. The inner guide member has a first helical groove and a second helical groove extending along a plurality of projections respectively provided in one row on the tip side and the base side of the tubular ...