Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6939889 | Quarternary ammonium compounds | Gregory N. Beatch, Lewis Siu Leung Choi, Bertrand M. C. Plouvier, Yuzhong Liu | 2005-09-06 |
| 6740673 | Quarternary ammonium compounds | Gregory N. Beatch, Lewis Siu Leung Choi, Bertrand M. C. Plouvier, Yuzhong Liu | 2004-05-25 |
| 6388095 | Indole-containing quaternary ammonium compounds | Gregory N. Beatch, Lewis Siu Leung Choi, Bertrand M. C. Plouvier, Yuzhong Liu | 2002-05-14 |
| 6362197 | Compositions and method for treatment of cough | Bernard A. MacLeod, David M. J. Quastel | 2002-03-26 |