Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6625578 | On-line game playing with advertising | Charles W. Spaur, James M. Wisler | 2003-09-23 |
| 6196920 | On-line game playing with advertising | Charles W. Spaur, James M. Wisler | 2001-03-06 |
| 5543087 | Multi-function fluid treatment system and method for using the same | Sun Y. Lee, Joseph A. Shaffer | 1996-08-06 |
| 5387339 | High efficiency liquid filtration system and method for using the same | Sun Y. Lee | 1995-02-07 |