Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5719665 | Method and apparatus for determining the content of insolubles in oils | — | 1998-02-17 |
| 5672873 | Method and apparatus for quantitative determination of components in residual fuel oils | — | 1997-09-30 |
| 4929847 | Rapid determination of sludge content and device therefor | Sadao Nakai, Yukimasa Fukui | 1990-05-29 |
| 4843247 | Determination of asphaltene content and device therefor | Hiroshi Tsuji | 1989-06-27 |