Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6830679 | Filtration device | Motoyuki Tsuihiji, Hirofumi Iinuma, Hiroyuki Umezawa | 2004-12-14 |
| 6814853 | Water treating method, water treating apparatus, and hydroponic system using the same | Yasuhito Kondo, Yasuhito Shimizu | 2004-11-09 |