Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6224039 | Chain block | Yosiaki Okamoto | 2001-05-01 |
| 6062543 | Hand operated chain block having an improved load chain device | Eikiti Kobayasi | 2000-05-16 |
| D424269 | Wheel cover for chain block | Tadasu Matusima, Yosiaki Okamoto | 2000-05-02 |
| 6032928 | Hand operated chain block having improved hand wheel | Yosiaki Okamoto, Eikiti Kobayasi | 2000-03-07 |