Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5403545 | Bearing steel | Akira Muroga, Yoshihiro Wakikado, Takao Ooki, Masao Goto, Hazime Tazumi +5 more | 1995-04-04 |
| 4702767 | Method of purifying a bearing steel | Tadamasa Yamada, Eiki Kikuchi | 1987-10-27 |
| 4642219 | Bearing steel and method of manufacturing the same | Tadamasa Yamada, Eiki Kikuchi | 1987-02-10 |