ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,708, issued on June 23, was assigned to SIGMA & HEARTS Co. LTD (Samutprakan, Thailand).
"Method for manufacturing constant velocity drive shaft" was invented by Motoharu Nuka (Samutprakan, Thailand), Smit Jaradswong (Chonburi, Thailand), Tsuyoshi Muramatsu (Kyoto, Japan) and Munemasa Kamizaiku (Shiga, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The prevent invention proposes to provide a method for manufacturing a constant velocity drive shaft, which can manufacture especially a constant velocity drive shaft among other drive shafts with efficiency and stable high accuracy. The method for manufacturing a constant velocity drive shaft using ...