Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5131320 | Image-forming griddle | Michael E. Jensen, Lester E. Langeland | 1992-07-21 |
| 4333524 | High efficiency furnace | Robert H. Elkins, Robert A. Macriss | 1982-06-08 |
| 4249594 | High efficiency furnace | Robert H. Elkins, Robert A. Macriss | 1981-02-10 |