Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4539012 | Pitch-containing composition | Osamu Ohzeki, Katsuhiko Shimakawa | 1985-09-03 |
| 4537600 | Method for the preparation of pitch-in-water slurry | Hiroto Tajima, Hironori Kawakami, Seinoshin Hayami, Osamu Ohzeki | 1985-08-27 |