Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9200225 | Method and apparatus for compacting coal for a coal coking process | Michael P. Barkdoll, Richard C. Retort | 2015-12-01 |
| 4727996 | Variable grip lifting mechanism | Ronald L. Fenn, Tim Abblett | 1988-03-01 |