Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6121168 | Wet type paper friction material with combined improved friction characteristics and compression fatigue strength | Tetsuya Ishitani, Takao Shibuya, Makoto Maeda, Nobutaka Chiba, Yasuhiro Murakami | 2000-09-19 |