Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4323185 | Friction welding process for making hollow bodies such as rollers and similar articles | Walter Grilli, Ivano Ferrari | 1982-04-06 |
| 4262973 | Junction link for endless chain tracks for tracked vehicles | Walter Grilli, Aldo Crotti | 1981-04-21 |