Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571294 | Process for extracting hydrocarbons from hydrocarbon bearing ores | Robert H. Friedman | 1986-02-18 |
| 4539093 | Extraction process and apparatus for hydrocarbon containing ores | Robert H. Friedman | 1985-09-03 |