ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,118, issued on March 18, was assigned to Kubota Corp. (Osaka, Japan).

"Hydraulic clutch and work-vehicle travel power transmission apparatus including the hydraulic clutch" was invented by Hidetoshi Hana (Sakai, Japan), Atsushi Jinnai (Sakai, Japan), Tomonari Tsuchida (Sakai, Japan), Ryoma Iwase (Sakai, Japan), Yosui Nishijima (Sakai, Japan) and Naoyuki Miyamoto (Sakai, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A clutch hub includes oil supply holes extending therethrough to supply lubricating oil from an interior of the clutch hub toward first clutch plates and second clutch plates. An injection port to allow injection of the lubricatin...