Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5225144 | Gas-carburizing process and apparatus | Keishichi Nanba, Yoshihiko Kitayama, Hitoshi Goi, Masahiko Watanabe | 1993-07-06 |
| 5133813 | Gas-carburizing process and apparatus | Keishichi Nanba, Yoshihiko Kitayama, Hitoshi Goi, Masahiko Watanabe | 1992-07-28 |