Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814085 | Fixing carrier for activated sludge in sewage or waste water treatment | Masahiro Fujii, Takehisa Muronaga, Takaharu Fujii | 1989-03-21 |
| 4814125 | Fixing carrier for activated sludge in sewage or waste water treatment | Masahiro Fujii, Takehisa Muronaga, Takaharu Fujii | 1989-03-21 |