Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4929847 | Rapid determination of sludge content and device therefor | Seigo Yamazoe, Sadao Nakai | 1990-05-29 |
| 4399024 | Method for treating petroleum heavy oil | Heihachiro Mukaida, Masato Inden | 1983-08-16 |