Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861929 | Process for producing halogenated benzene derivative using zeolite catalyst | Takanori Miyake, Kazuhiko Sekizawa, Toshio Hironaka | 1989-08-29 |
| 4849560 | Process for preparation of halogenated benzene derivatives | Kazuhiko Sekizawa, Takanori Miyake, Toshio Hironaka | 1989-07-18 |
| 4845297 | Process for producing polyamines | Sadakatsu Kumoi, Keiji Mitarai | 1989-07-04 |