Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679243 | Water purifier having a filter replacement indicator including a circuit board and lamps | — | 1997-10-21 |
| 5676824 | Water purifier with means for indicating when filter replacement is due and for automatically initiating a membrane washing step | Je-Dal Jeon, Sun-Yong Choi, Keun-Ho Lee, In-Seog Chung | 1997-10-14 |