ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,322, issued on July 1, was assigned to KOMATSU LTD. (Tokyo).

"Planetary gear mechanism" was invented by Keita Naitou (Tokyo), Tetsuya Yamauchi (Tokyo) and Yuta Yamauchi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A planetary gear mechanism includes a plurality of planetary gears with helical teeth, a sun gear disposed inside the plurality of planetary gears to mesh with the plurality of planetary gears, a ring gear disposed outside the plurality of planetary gears to mesh with the plurality of planetary gears, a plurality of shafts rotatably supporting the plurality of planetary gears, a first support wall supporting first ends of the plura...