Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6254489 | Amusement attraction with man-made tornado | Nicholas H. Drobnis, Craig Robert Hanna, Philip Hettema, James H. Hightower, Cecil D. Magpuri | 2001-07-03 |
| 6220171 | Amusement ride | Philip Hettema, Cecil D. Magpuri, Aidan J. Bradley, Kevin T. Parent | 2001-04-24 |
| 5833544 | Film and live action theater | Harry C. Corbin, Jim Crossley, Nicholas H. Drobnis, Fred Gallo, James M. Lehner +3 more | 1998-11-10 |