Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5249882 | Self-tapping screw | Osami Iwasaki, Tetuya Akashi | 1993-10-05 |
| 5205694 | Self-tapping screw | Osami Iwasaki, Tetuya Akashi | 1993-04-27 |
| 5203657 | Self-tapping screw | Osami Iwasaki, Tetuya Akashi | 1993-04-20 |
| 4323326 | Self-drilling screw | Mitsuo Okada, Yoshihisa Matsumoto | 1982-04-06 |