Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7806208 | Stair climbing platform apparatus and method | Christian W Brown, James P. Gunderson | 2010-10-05 |
| 7380618 | Stair climbing platform apparatus and method | Christian W Brown, James P. Gunderson | 2008-06-03 |