Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5597109 | Welding method for forming chromium oxide passivated film at welded portion, welding apparatus, and process apparatus | Tadahiro Ohmi, Shinji Miyoshi | 1997-01-28 |
| 4781735 | Enrichment in oxygen gas | Taichi Tagawa, Yasuto Suzu, Shigeki Hayashi | 1988-11-01 |