Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4408723 | Method of and apparatus for the treatment of pyrite-containing mineral coal | Fritz Adrian, Heinrich Sattler | 1983-10-11 |
| 4389019 | Method of and apparatus for the dry separation of pyrite from coal | Fritz Adrian, Heinrich Sattler | 1983-06-21 |