Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4986895 | Process for treating coal tar or coal tar pitch | Katsumi Fujita, Yoshiteru Nakagawa, Yasunori Goda, Toyohiro Maeda | 1991-01-22 |
| 4640761 | Process for preparing pitch | Satoshi Kibe, Toyohiro Maeda | 1987-02-03 |
| 4617682 | Method and apparatus for automatic quantitative measurement of textures by image analysis | Kazuo Nakamura, Kanichiro Tanabe, Atsushi Kimura | 1986-10-14 |