Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6216757 | Low noise level tire | Masashi Ohara | 2001-04-17 |
| 5181976 | Pneumatic tire having expanded outer tread rubber layer | Seiichiro Iwafune, Kojiro Yamaguchi, Toshiro Iwata | 1993-01-26 |
| 4945964 | Tire with defined inner and outer tread rubber compositions | Toshiharu Kikutsugi | 1990-08-07 |
| 4748199 | Low fuel consumption tire with all weather performances | Kazuaki Yuto, Toru Oniki | 1988-05-31 |
| 4640952 | Pneumatic tire having all-weather running performances | Kazuaki Yuto, Toru Oniki | 1987-02-03 |
| 4624296 | Pneumatic tire suitable for running on snow and ice roads | — | 1986-11-25 |
| 4567928 | Pneumatic tire suitable for running on snow and ice roads | — | 1986-02-04 |