Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6338175 | Movable safety tunnel for use during bridge maintenance | Valery Tsimmerman | 2002-01-15 |
| 6170106 | Movable safety tunnel for use during bridge maintenance | Valery Tsimmerman | 2001-01-09 |