Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7721500 | Multi-layered fire door and method for making the same | Randy Jon Clark, Gary Koepke, Brent David Olson, William Robert Transue | 2010-05-25 |
| 7185468 | Multi-layered fire door and method for making the same | Randy Jon Clark, Gary Koepke, Brent David Olson, William Robert Transue | 2007-03-06 |