Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7291312 | Ozone removing material and method for preparing the same | Seiji Iimura, Kazuyoshi Takeda, Kunio Fujiwara | 2007-11-06 |
| 6009739 | Method for evaluating performance of chemical filter for cleaning gas | Kunio Fujiwara, Takeshi Takai, Kazuo IWAKI, Hideo Kawazu, Hideaki Sekiguchi | 2000-01-04 |