Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879041 | Process for producing ultra-pure water and process for using said ultra-pure water | Hideaki Kurokawa, Akira Yamada, Yasuo Koseki, Katsuya Ebara, Sankichi Takahashi +5 more | 1989-11-07 |