Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4620931 | Three phase fluidized bed water purifying process | Akira Hirata, Akinori Watanabe, Kouji Nitta, Kenji Shimaji | 1986-11-04 |
| 4540553 | Desulfurizing agent | Hiroshi Hagiwara, Masaru Shirasaka | 1985-09-10 |