HH

Hiroshi Hirakawa

The Yokohama Rubber Co.: 4 patents #1 of 14Top 8%
BL Bridgestone Tire Company Limited: 1 patents #19 of 82Top 25%
NC Nippon Zeon Co.: 1 patents #4 of 38Top 15%
Overall (1982): #1,202 of 81,411Top 2%
5
Patents 1982

Issued Patents 1982

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
4349061 Pneumatic radial tires for passenger cars having a low rolling resistance Akio Sato, Takashi Takusagawa, Nobumasa Ikeda 1982-09-14
4342670 Process for preparing rubber compositions for tire treads Asahiro Ahagon, Makoto Misawa 1982-08-03
4323485 Rubber compositions for tire treads having low rolling resistance Asahiro Ahagon, Makoto Misawa, Kazuo Miyasaka 1982-04-06
4321168 Process for preparing rubber composition for tire treads Akio Ueda, Shuichi Akita, Asahiro Ahagon 1982-03-23
4309318 Tread compositions for tires having low rolling resistance Asahiro Ahagon, Makoto Misawa, Kazuo Miyasaka 1982-01-05