Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835312 | Production process of N-substituted amide compounds | Hiroshi Itoh, Atsuhiko Nitta | 1989-05-30 |
| 4828710 | Method for the extraction of water from macromolecular solutions | Hiroshi Itoh, Atsuhiko Nitta, Tomio Tanaka, Hideo Kamio | 1989-05-09 |