Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5826545 | Animal caging system | John T. Steffes, Joseph M. Erwin | 1998-10-27 |
| 5247901 | Containment system for promoting improved animal well-being | Joseph M. Erwin, John T. Steffes | 1993-09-28 |