Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5244356 | Hydraulic piston apparatus | — | 1993-09-14 |
| 5202546 | Root pass bead welding method | Shigeru Nakayama, Masaki Tanaka, Katsumi Miyagawa | 1993-04-13 |
| 4916853 | Method for manufacturing welded pipes | Shigetomo Matsui | 1990-04-17 |
| 4796798 | Method of and apparatus for continuous production of seam-welded metal tubing | Toshio Tsuta, Koji Kadota, Shigetomo Matsui, Hiroyuki Matsumura, Hiromichi Nakamura +3 more | 1989-01-10 |
| 4717065 | Method for manufacturing welded pipes | Shigetomo Matsui | 1988-01-05 |