Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4431339 | Under ice oil barrier | — | 1984-02-14 |
| 4354778 | Waterfall technique for removing settled coal solids from a storage facility | — | 1982-10-19 |
| 4264450 | Fibrous disc oil skimmer | Ray R. Ayers | 1981-04-28 |