ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,069, issued on May 26, was assigned to KANZAKI KOKYUKOKI MFG. Co. LTD. (Amagasaki, Japan) and YANMAR HOLDINGS Co. LTD. (Osaka, Japan).

"Transmission structure" was invented by Takumi Takahashi (Amagasaki, Japan), Kohei Ogura (Amagasaki, Japan) and Tasuku Inoue (Amagasaki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "[Problem] To provide a transmission structure that includes a main transmission unit performing continuous speed changing and an auxiliary transmission unit performing multi-stage gear shifting and that can prevent a shock at the time of switching a gear stage of the auxiliary transmission unit during travel as much as possible. [...