Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4366008 | Method for hardening steel | Jun Takeuchi, Kaishu Yamazumi | 1982-12-28 |
| 4340464 | Method for thermal cracking of heavy petroleum oil | Takaaki Aiba, Hisatsugu Kaji, Tomizo Endo | 1982-07-20 |