Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8965009 | Speaker with built-in filter for digital amplifier | Min Soo Kim, Hyung Sup Yoon | 2015-02-24 |
| 7166222 | Method for biologically purifying waste water | Alfons Vogelpohl | 2007-01-23 |