Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7407824 | Guard ring for improved matching | Daniel Charles Kerr, Roscoe Luce, Alan S. Chen, William A. Russell | 2008-08-05 |
| 7253012 | Guard ring for improved matching | Daniel Charles Kerr, Roscoe Luce, Alan S. Chen, William A. Russell | 2007-08-07 |