ALEXANDRIA, Va., June 4 -- United States Patent no. 12,318,828, issued on June 3, was assigned to A.L.M.T. Corp. (Tokyo) and Sumitomo Electric Industries Ltd. (Osaka, Japan).
"Wire drawing die" was invented by Kohei Kuramoto (Osaka, Japan), Takuya Kinoshita (Sumoto, Japan), Yutaka Kobayashi (Osaka, Japan), Makoto Yukawa (Kato, Japan), Kohichiroh Kimura (Sumoto, Japan) and Kentaro Shiro (Kato, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A wire drawing die 1 includes a non-diamond material, is provided with a die hole 1h, and has a reduction 1c and a bearing 1d that is positioned downstream of the reduction 1c. A reduction angle Gamma which is an opening angle of the die hole 1h at the reduction 1c is...