Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796798 | Method of and apparatus for continuous production of seam-welded metal tubing | Toshio Tsuta, Koji Kadota, Shigetomo Matsui, Hiroyuki Matsumura, Hisao Hasegawa +3 more | 1989-01-10 |
| 4771931 | Continuous production of seam-welded metal tubing | Shigetomo Matsui, Hiroyuki Matsumura, Munekatsu Furugen | 1988-09-20 |