Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6347431 | Carpet located and retaining system | Mark E. Gratowski, Dan Ludwig, Geoff Davies | 2002-02-19 |
| 6131241 | Carpet locator and retaining system | Mark E. Gratowski, Dan Ludwig, Geoff Davies | 2000-10-17 |