Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5169823 | Method for stabilizing treatment of catalytic activity | Yukihiro Yoshikawa, Teruo Hirayama, Kunihiro Yamada, Shinji Takenaka | 1992-12-08 |
| 5093292 | Chromium oxide catalyst impregnation regeneration method | Yukihiro Yoshikawa, Kunihiro Yamada, Shinji Takenaka, Kazunori Kawahara, Jun Kitagawa | 1992-03-03 |