Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4561018 | Apparatus for continuously inspecting the physical characteristics of particulate matter | Robert O. Berthel, Vernon G. Plank | 1985-12-24 |
| 4499761 | Snow scale/rate meter | Vernon G. Plank, Anthony J. Matthews, Robert O. Berthel | 1985-02-19 |
| 4476718 | Rain rate meter | Vernon G. Plank, Stephen D. Crist | 1984-10-16 |