Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5267455 | Liquid/supercritical carbon dioxide dry cleaning system | Thomas Gerret Dewees, Frank Knafelc, James D. Mitchell, R. Gregory Taylor, Robert J. Iliff +2 more | 1993-12-07 |
| D327805 | Combined kettle and side tables for a barbeque grill | James Parent, Frederick G. Doolittle, Ronald E. Heiskell, Jon L. Ellgen, Frank Knafelc | 1992-07-14 |
| D325318 | Combined kettle and side tables for a barbeque grill | James Parent, Frederick G. Doolittle, Ronald E. Heiskell, Jon L. Ellgen, Frank Knafelc | 1992-04-14 |
| D322909 | Barbeque grill | James Parent, Frederick G. Doolittle, Ronald E. Heiskell, Jon L. Ellgen, Ernest R. Gillam | 1992-01-07 |