Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5167367 | Snowmaking apparatus and methods | William C. Topham, Donald R. Koenig, Joseph Mark VanderKelen | 1992-12-01 |
| 4335658 | Downhill slide system | — | 1982-06-22 |
| 4214700 | Method and apparatus for making snow for ski slopes and the like | William E. Riskey | 1980-07-29 |
| 4202496 | Snow making system | James L. Dilworth | 1980-05-13 |