Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5507950 | Floating water purification device and water purification method | Shohei Senda | 1996-04-16 |
| 5399266 | Microbial media and waste water treatment method using same | Jong Ok Han | 1995-03-21 |