Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5749315 | Animal feeder | — | 1998-05-12 |
| 5226748 | Trench drain channel clip support | August W. Haupt | 1993-07-13 |
| 5213438 | Chemical safety trench drain conduit | — | 1993-05-25 |
| 4940359 | Chemical safety conduit or trench | Phillip L. Van Duyn, Kenneth E. Kruse | 1990-07-10 |