Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5849183 | Filtration apparatus | Seizo Ota | 1998-12-15 |
| 5603846 | Fractional filtration method and fractional filtration apparatus | Koji Tomizama | 1997-02-18 |
| 4992167 | Filtering apparatus | — | 1991-02-12 |
| 4895647 | Filtering apparatus | — | 1990-01-23 |
| 4724077 | Rotary drum filter with sliding perforated buckets | — | 1988-02-09 |