US Patent Issued to YAMAHA HATSUDOKI on Feb. 3 for "Jet propulsion watercraft" (Japanese Inventor)

ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,951, issued on Feb. 3, was assigned to YAMAHA HATSUDOKI K.K. (Shizuoka, Japan).

"Jet propulsion watercraft" was invented by Mitsuyoshi Nakamura (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A jet propulsion watercraft includes a watercraft body, a drive source in the watercraft body, a jet pump to suck and eject water with a drive force from the drive source to generate a propulsive force, a vibration sensor, and a controller. The vibration sensor is located in the jet pump to detect vibration of the jet pump. The controller is configured or programmed to determine whether or not a detection result from the vibration sensor meets a ...