Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882020 | Process for treating effluent gas | Akihiko Maezawa, Mitsuyoshi Kaneko, Shinji Aoki | 1989-11-21 |
| 4882108 | Method for producing polypropylene foam | Takao Kimura, Yoshinobu Nagaoka | 1989-11-21 |