Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4918283 | Method of and apparatus for conducting plasma welding | Takashi Yamade, Seishi Watahiki, Masayoshi Yamaguchi, Shinichi Kurita | 1990-04-17 |
| 4788409 | Method of and apparatus for automatically conducting all position plasma welding of pipes | Takashi Yamade, Seishi Watahiki, Masayoshi Yamaguchi, Shinichi Kurita | 1988-11-29 |
| 4770105 | Piping travelling apparatus | Atsushi Takagi, Shinichi Kurita, Seishi Watahiki, Kiyoshi Sakamoto, Chikara Sato | 1988-09-13 |
| 4644791 | Moving apparatus for a hollow curved pipe-arrangement and an operating method in the pipe-arrangement by using the moving apparatus | Shinji Sonoda, Norihiko Ozaki, Seishi Watahiki, Masayoshi Yamaguchi | 1987-02-24 |