Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10000938 | Concrete void forming method and device | Bruce Duane Stiles, Stephen Ray Stiles | 2018-06-19 |
| 9771728 | Device for forming a void in a concrete foundation | Bruce Duane Stiles, Stephen Ray Stiles | 2017-09-26 |