Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5633094 | Valve having facing layers of co-free Ni-base Alloy | Kikuo Takeshima, Shin Kumagai, Masato Koshiishi | 1997-05-27 |
| 4223197 | Method of cooling weld in steel piping and apparatus therefor | Katsuyuki Imai, Isao Masaoka, Jiro Kuniya | 1980-09-16 |