Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5580445 | Continuous ion exchange apparatus | Kazuhiko Shimizu | 1996-12-03 |
| 5262051 | Apparatus for biological treatment of water and waste, of the attached-growth type | — | 1993-11-16 |
| 4915833 | Column filter using bundles of long fibers | Toshio Kasai | 1990-04-10 |
| 4886601 | Column filter using bundles of long fibers | Toshio Kasai | 1989-12-12 |
| 4293423 | Process and apparatus for ion exchange by use of thermally regenerable resin | Kenji Kosaka, Ikuo Shindo, Akira Hotogi | 1981-10-06 |