Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8608133 | Communication installation support tool for tunnels and subways | Sam Warren | 2013-12-17 |
| 7950628 | Flat railcar work platform and wheel assembly with locking mechanism | Sam Warren | 2011-05-31 |