Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5628449 | Method of welding a carbon steel and an austenitic stainless steel together and resultant structure | Tsutomu Onuma, Toshimi Matsumoto, Masami Yada, Koji Goto, Osamu Matsushima +2 more | 1997-05-13 |
| 5601735 | Long-sized tubular grounding container unit for gas-insulated electrical device and laser welding device for manufacturing the same | Hideo Kawamoto, Tokio Yamagiwa, Shinji Fukuda, Masayoshi Hashiura, Osamu Isshiki +1 more | 1997-02-11 |
| 5498849 | Structure of metal container having trunk pipe and branch pipe, and manufacturing method and apparatus therefor | Osamu Isshiki, Osamu Matsushima, Sadao Nakagawa, Seizo Nakano, Koji Goto +7 more | 1996-03-12 |
| 5444206 | Structure of metal container having trunk pipe and branch pipe, and manufacturing method and apparatus therefor | Osamu Isshiki, Osamu Matsushima, Sadao Nakagawa, Seizo Nakano, Koji Goto +7 more | 1995-08-22 |
| 4263491 | Method for checking electric contacts of an enclosed-type switching device and an auxiliary apparatus for use with the switching device to use the method | Seizo Nakano, Hiroshi Itoh, Shigeo Shiono, Takeshi Takahashi | 1981-04-21 |