YU

Yujiro Umezawa

Bridgestone: 9 patents #248 of 2,860Top 9%
BL Bridgestone Tire Company Limited: 2 patents #115 of 438Top 30%
Overall (All Time): #473,914 of 4,157,543Top 15%
11
Patents All Time

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDate
5647928 Heavy duty pneumatic tires with reduced belt weight 1997-07-15
5526864 Steel cords for rubber reinforcement and pneumatic radial tires using the cords in the carcass Yoshinori Kuriya 1996-06-18
5520233 Heavy duty pneumatic tires with reduced belt weight 1996-05-28
5400580 Steel cords for rubber reinforcement and pneumatic radial tires using the same Yoshinori Kuriya 1995-03-28
5050657 Pneumatic tire with steel cords having a closed twisted structure or a compact structure 1991-09-24
4966216 Heavy duty radial tires with metallic carcass ply Kiyohito Kawasaki, Toshio Sugawara 1990-10-30
4917165 Steel cords for the reinforcement of rubber articles 1990-04-17
4788815 Steel cords for the reinforcement of rubber articles 1988-12-06
4707975 Steel cords for the reinforcement of rubber articles 1987-11-24
4572264 Pneumatic radial tires Shigehisa Sano, Takao Ogino 1986-02-25
4488587 Pneumatic radial tires Yoshio Suzuki, Teruo Miura, Kiyohito Kawasaki 1984-12-18