Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8966859 | Staircase and method for construction | Philip R. Keller, Shoukat A. Turabi | 2015-03-03 |
| 8707638 | Staircase and method for construction | Philip R. Keller, Shoukat T. Turabi | 2014-04-29 |