Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6205730 | Roofing plate for securing roofing membrane | Riaz Hasan, Paul M. Larson | 2001-03-27 |
| 5649719 | Linkage suspension system | Tjong T. Lie, Michael J. Keeler, Michael Gottshalk, John E. Ramsey, Allen Hatch +2 more | 1997-07-22 |