Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6939889 | Quarternary ammonium compounds | Gregory N. Beatch, Lewis Siu Leung Choi, Clive P. Page, Yuzhong Liu | 2005-09-06 |
| 6740673 | Quarternary ammonium compounds | Gregory N. Beatch, Lewis Siu Leung Choi, Clive P. Page, Yuzhong Liu | 2004-05-25 |
| 6388095 | Indole-containing quaternary ammonium compounds | Gregory N. Beatch, Lewis Siu Leung Choi, Clive P. Page, Yuzhong Liu | 2002-05-14 |