Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5466110 | Lifting device | — | 1995-11-14 |
| 5257877 | Lifting device | Robert F. Zelinka | 1993-11-02 |
| 5069593 | Lifting device | Robert F. Zelinka | 1991-12-03 |
| 5024573 | Lifting device | Robert F. Zelinka | 1991-06-18 |
| 4911600 | Lifting device | Robert F. Zelinka | 1990-03-27 |
| 4741658 | Receptacle dumping apparatus and method | Robert F. Zelinka | 1988-05-03 |