Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5758717 | System and method for the recovery of waste heat from pipelines | — | 1998-06-02 |
| 5137012 | Pellet burning stove | Derik K. Andors, Richard Simon Blackburn, Allan S. Wilker, John H. Guest | 1992-08-11 |
| 4646712 | Solid fuel heating appliances | Robert W. Ferguson, Derik K. Andors | 1987-03-03 |
| 4582044 | Clean burning exterior retrofit system for solid fuel heating appliances | Robert W. Ferguson, Derik K. Andors | 1986-04-15 |
| 4510918 | Woodburning heating apparatus | Robert W. Ferguson, Derik K. Andors | 1985-04-16 |