Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8012504 | Sustained release of guaifenesin combination drugs | Robert D. Davis, Donald Jeffrey Keyser | 2011-09-06 |
| 7985420 | Sustained release of guaifenesin combination drugs | Robert D. Davis, Donald Jeffrey Keyser | 2011-07-26 |
| 7985421 | Sustained release formulations of guaifenesin and additional drug ingredients | Robert D. Davis, Donald Jeffrey Keyser | 2011-07-26 |
| 7838032 | Sustained release of guaifenesin | Robert D. Davis, Donald Jeffrey Keyser | 2010-11-23 |
| 6955821 | Sustained release formulations of guaifenesin and additional drug ingredients | Robert D. Davis, Donald Jeffrey Keyser | 2005-10-18 |
| 6372252 | Guaifenesin sustained release formulation and tablets | Robert D. Davis, Donald Jeffrey Keyser | 2002-04-16 |