Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36612 | Mash seam welding process and mash seam welding apparatus | Masaki Tanzawa | 2000-03-14 |
| 5789718 | Mash seam welding process and mash seam welding apparatus | Masaki Tanzawa | 1998-08-04 |
| 5726410 | Seam welding process and seam welding apparatus | Masaki Tanzawa, Nobuhide Kondou, Fumiaki Natsumi, Munetaka Toda | 1998-03-10 |
| 5014752 | Nonfreezing pipe | Takefumi Takenakajima, Kazuo Nishimura, Mamoru Fujiyama | 1991-05-14 |