Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5216931 | Interlock mechanism for range section slave valve | Mark A. Hirsch | 1993-06-08 |
| 5172604 | Range section preexhaust | Daniel A. Monette, Mark A. Hirsch, Terry E. Teeter | 1992-12-22 |