Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D398726 | Waste container trolley | Donald C. Presnell, Robert J. Tokash, Joel Wittkamp | 1998-09-22 |
| 5704625 | Trash container carrier | Donald C. Presnell, Carl Schulz, Robert J. Tokash, Joel Wittkamp | 1998-01-06 |