Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5492161 | Pneumatic tire with groove steps having sipes | Takeyoshi Koyama, Katsuharu Mitsutake | 1996-02-20 |
| 5225011 | Tire of superior cut resistance | Hiroshi Takino, Katsuji Kishida, Keijiro Oda | 1993-07-06 |