Toshiyuki Ookuma

HI Hitachi: 2 patents #13,388 of 28,497Top 50%

NC Nkk Co.: 2 patents #309 of 1,173Top 30%

HE Hitachi Vlsi Engineering: 1 patents #390 of 666Top 60%

📍 Wenatchee, WA: #71 of 245 inventorsTop 30%

🗺 Washington: #23,018 of 76,902 inventorsTop 30%

Overall (All Time): #1,287,936 of 4,157,543Top 35%

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
5641578	Weldable black steel sheet	Naoto Yoshimi, Masaaki Yamashita, Tatsuya Miyoshi, Toyofumi Watanabe, Tsutomu Watanabe	1997-06-24
5609968	Weldable colored steel sheet	Naoto Yoshimi, Toyofumi Watanabe, Masaaki Yamashita, Tatsuya Miyoshi	1997-03-11
5053652	High speed sensor system using a level shift circuit	Yoichi Sato, Masao Mizukami	1991-10-01
4984204	High speed sensor system using a level shift circuit	Yoichi Sato, Masao Mizukami	1991-01-08