Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5522646 | Apparatus for cutting free manhole casings in coatings | Gershon Friedman | 1996-06-04 |
| 5104195 | Self-propelled apparatus for cutting asphalt and concrete | — | 1992-04-14 |