Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5647287 | Ash clinker ramming apparatus | Larry E. Kuennen, Gary M. Crisp | 1997-07-15 |
| 5628259 | Economizer lump breaker | Larry E. Kuennen, Gary M. Crisp, Randy A. Dailey | 1997-05-13 |