Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5620696 | Polyurethane insecticidal ear tag and method of use | Rudolf J. Krzewki | 1997-04-15 |
| 5342619 | Polyurethane insecticidal ear tag, methods of use and preparation | Rudolf J. Krzewki | 1994-08-30 |