Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832742 | Flexible refining-agent clad wire for refining molten iron group metal | — | 1989-05-23 |
| 4820485 | Method of producing an iron-, cobalt- and nickel-base alloy having low contents of sulphur, oxygen and nitrogen | Toru Degawa, Kenichi Kusumoto, Makoto Ebata | 1989-04-11 |