Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4565546 | Condensation product and use thereof as dispersant for pitch in water slurry | Osamu Ohzeki, Akihiko Shimizu, Toshio Kanai | 1986-01-21 |
| 4539012 | Pitch-containing composition | Osamu Ohzeki, Zenichi Mashino | 1985-09-03 |