Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4904486 | Animal feed blocks containing dietary supplements | Dennis Donovan, Michael McDonnell, Gerald C. Weigel | 1990-02-27 |
| 4708877 | Animal feed blocks containing dietary supplements | Dennis Donovan, Michael McDonnell, Gerald C. Weigel | 1987-11-24 |