| Number | Name | Date | Kind |
|---|---|---|---|
| 2587177 | Larson | Feb 1952 | A |
| 5678653 | Clinch | Oct 1997 | A |
| D486243 | Yamaoka | Feb 2004 | S |
| 6892860 | Gibson | May 2005 | B2 |
| 8042653 | Grebinoski et al. | Oct 2011 | B2 |
| 20060169539 | Grebinoski | Aug 2006 | A1 |
| Entry |
|---|
| Harbor Freight, “Step Stool/Working Platform”. http://www.harborfreight.com/step-stool-working-platform-66911.html, accessed Sep. 17, 2015, 1 pg. |
| California Car Cover Co., “Folding Platform Ladder”. http://www.calcarcover.com/product/1562/107/Folding—Platform—Ladder, accessed Sep. 17, 2015, 2 pgs. |
| Bauer Corporation, “20900 Fold-N-Go Platform 500 lb. Capacity”. http://www.bauerladder.com/safety-ladder/20900-fold-n-go-work-platform.html, accessed Sep. 17, 2015, 1 pg. |
| http://www.canbuilt.com/images—thumb/WP-1238.jpg, accessed Sep. 17, 2015, 1 pg. |
| http://sell.lulusoso.com/upload/20120309/Aluminium—work—platform.jpg, accessed Sep. 17, 2015, 1 pg. |