Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4342900 | Vacuum shield device of an electron beam welding apparatus | Shuzo Susei, Hiroyoshi Nagai | 1982-08-03 |
| 4332073 | Method of producing multiple-wall composite pipes | Toshio Yoshida | 1982-06-01 |