Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5263533 | Mold for producing thin wall castings by gravity pouring | Alan Druschitz, Edward Frank Ryntz, Robert Ramage | 1993-11-23 |
| 4685674 | Air-swing ball game | — | 1987-08-11 |
| 4573665 | Self-contained exothermic cutting system | Robert L. Strohl, Paul E. Moore | 1986-03-04 |
| D269973 | Combined underwater cutting and welding torch | David E. Johnson | 1983-08-02 |
| 4361746 | Underwater cutting and welding torch | David E. Johnson | 1982-11-30 |