Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695769 | Pasteurella multocida toxoid vaccines | Joseph C. Frantz, David Roberts, Richard J. Kemmy | 1997-12-09 |
| 5616328 | Method of preparing gram-negative bacterial vaccines | David Roberts, Donald A. Dearwester | 1997-04-01 |