Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887950 | Waterproof nut | Kiyoshi Sakayori, Shinichi Iwasaki, Toshikazu Shinogaya, Yuzo Ishizuka | 1989-12-19 |
| 4788022 | Method of manufacturing waterproof nuts | Kiyoshi Sakayori, Shinichi Iwasaki, Toshikazu Shinogaya, Yuzo Ishizuka | 1988-11-29 |