Shunichi Tomizuka

JR Japanese National Railways: 1 patents #19 of 102Top 20%

TW The Japan Steel Works: 1 patents #307 of 643Top 50%

📍 Otofuke, JP: #269 of 546 inventorsTop 50%

Overall (All Time): #3,956,458 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4760900	Friction brakes	Takashi Shima, Katuro Takasawa, Tomoharu Ashikawa, Taro Tsujimura, Yasuo Takenaka	1988-08-02