Yukio Nakako

AL Asia Oil Company Limited: 1 patents #1 of 4Top 25%

IC Idemitsu Kosan Co.: 1 patents #13 of 55Top 25%

KS Kobe Steel: 1 patents #20 of 161Top 15%

NC Nippon Brown Coal Liquefaction Co.: 1 patents #1 of 4Top 25%

MC Mitsubishi Chemical: 1 patents #25 of 161Top 20%

Overall (1989): #39,480 of 140,708Top 30%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4818374	Process for converting coal to an oil fraction	Nobuyoshi Hirokoh, Yoichi Kageyama, Tetsuo Matsumura	1989-04-04