US Patent Issued to YAMAHA HATSUDOKI on April 21 for "Marine propulsion device" (Japanese Inventors)

ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,290, issued on April 21, was assigned to YAMAHA HATSUDOKI K.K. (Shizuoka, Japan).

"Marine propulsion device" was invented by Kimitaka Saruwatari (Shizuoka, Japan), Akihiro Noma (Shizuoka, Japan), Masanari Mori (Shizuoka, Japan), Yushi Fujita (Shizuoka, Japan), Hiroaki Kageyama (Shizuoka, Japan) and Shinobu Murouchi (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A marine propulsion device includes a first gear, a second gear, a third gear, a circulator, a case, and an attachment body. The second gear is meshed with the first gear. The third gear is meshed with the first gear, and the third gear is coaxial with the second gear and op...