Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4702767 | Method of purifying a bearing steel | Yatsuka Takata, Eiki Kikuchi | 1987-10-27 |
| 4642219 | Bearing steel and method of manufacturing the same | Yatsuka Takata, Eiki Kikuchi | 1987-02-10 |