Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11305467 | Toggled roll stack | Richard S. Risch | 2022-04-19 |
| 6254369 | Extrusion die for forming a skin on reusable construction material for concrete forms | Daniel Kelly, Richard S. Risch | 2001-07-03 |