Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6745472 | Manufacturing method of steel ball for rolling bearing | Yoshiki Fujita, Hajime Tazumi, Hideji Yoshida | 2004-06-08 |
| 6423111 | Ball for ball-point pen | Hideji Yoshida | 2002-07-23 |