Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5681736 | Methods for producing enhanced antigenic shigella bacteria and vaccines comprising same | Richard Ives Walker, Steven Frey | 1997-10-28 |
| 5679564 | Methods for producing enhanced antigenic campylobacter bacteria and vaccines | Richard Ives Walker, Steven Frey | 1997-10-21 |