Issued Patents 1997
Showing 1–2 of 2 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 |