Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4293390 | Apparatus for treatment of hydrocarbon-containing mineral material | Charles A. Czako, Carl J. Nelson | 1981-10-06 |
| 4200517 | Treatment of hydrocarbon-containing mineral material | Charles A. Czako, Carl J. Nelson | 1980-04-29 |