Shigeo Yamada

Mitsubishi Electric: 10 patents #2,886 of 25,717Top 15%

NC Nippon Soda Co.: 5 patents #83 of 648Top 15%

TK Tsudakoma Kogyo: 4 patents #15 of 130Top 15%

NE Nec: 2 patents #5,510 of 14,502Top 40%

TO Toshiba: 2 patents #606 of 2,688Top 25%

TO Toyota: 1 patents #15,335 of 26,838Top 60%

TS Tsudakoma: 1 patents #13 of 37Top 40%

MK Mitsubishi Denki K.K.: 1 patents #164 of 577Top 30%

Overall (All Time): #141,268 of 4,157,543Top 4%

Patents All Time

Issued Patents All Time

Showing 26–27 of 27 patents

Patent #	Title	Co-Inventors	Date
4370537	Electric discharge machine	Toshiro Oizumi, Tetsuro Ito	1983-01-25
4332995	Electrical discharge machine	Tetsuro Ito, Toshiro Oizumi	1982-06-01