Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6375390 | Method for widening road, superhighway or railway tunnels, without interrupting the traffic | — | 2002-04-23 |
| 5482408 | Embankment formed by preformed collaborating assemblable elements, in particular for road or railway constructions, and process | — | 1996-01-09 |
| 4929123 | Method for building large span tunnels by means of a cellular arch | — | 1990-05-29 |