Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5617823 | Spark-ignited reciprocating piston engine having a subdivided combustion chamber | Charles L. Gray, Jr., Gary W. Rogers, Ulrich Hilger | 1997-04-08 |
| 4477338 | Method and apparatus for processing high-ash coal slurries by flotation, particularly for processing gas coal and open-burning coal which are difficult to float | — | 1984-10-16 |