Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883937 | Butt welding method by means of laser beam | Kenji Matsuno, Tsuneo Imatani, Nobuyuki Sato, Osamu Teruuchi | 1989-11-28 |
| 4858782 | Metal vessel having circumferential side seam and process for production thereof | Hisakazu Yasumuro, Michio Watanabe, Kazuo Taira, Tsuneo Imatani | 1989-08-22 |
| 4800250 | Methods and apparatus for manufacturing tubes | Michio Watanabe, Kazuhisa Ishibashi, Kenji Matsuno | 1989-01-24 |