Yujiro Umezawa

USPTO Granted Patents = 11 (Patent Applications = 3)

Average Co-Inventor Count = 1.4

ph-index = 6

Forward Citations = 95(Granted Patents)

Location History:

Higashimurayama, JP (1984)
Tokyo, JP (1986 - 1997)

Company Filing History:

9 out of 5,118

Bridgestone Corporation

patents

2 out of 504

Bridgestone Tire Company Limited

patents

Years Active: 1984-1997

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11 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5647928 - Heavy duty pneumatic tires with reduced belt weight (1997-07-15),

2. 5526864 - Steel cords for rubber reinforcement and pneumatic radial tires using (1996-06-18),

3. 5520233 - Heavy duty pneumatic tires with reduced belt weight (1996-05-28),

4. 5400580 - Steel cords for rubber reinforcement and pneumatic radial tires using (1995-03-28),

5. 5050657 - Pneumatic tire with steel cords having a closed twisted structure or a (1991-09-24),

6. 4966216 - Heavy duty radial tires with metallic carcass ply (1990-10-30),

7. 4917165 - Steel cords for the reinforcement of rubber articles (1990-04-17),

8. 4788815 - Steel cords for the reinforcement of rubber articles (1988-12-06),

9. 4707975 - Steel cords for the reinforcement of rubber articles (1987-11-24),

10. 4572264 - Pneumatic radial tires (1986-02-25),

11. 4488587 - Pneumatic radial tires (1984-12-18),

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3 patents pending:

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