ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,944, issued on June 24, was assigned to YAMAHA HATSUDOKI K.K. (Shizuoka, Japan).
"Outboard motor" was invented by Shinya Kasai (Shizuoka, Japan), Koichi Nakayama (Shizuoka, Japan) and Shinya Maekawa (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An outboard motor includes an engine, a relay exhaust pipe, a downstream exhaust pipe connected to the relay exhaust pipe, and a propeller to be driven by the engine. The engine includes a plurality of cylinders arranged in series along a vertical direction, a plurality of exhaust ports respectively extending from the combustion chambers of the plurality of cylinders in a sideward direction,...