Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4318637 | Process and device for the assembly of voussoirs for tunnel linings | Jean-Claude Hauer | 1982-03-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4318637 | Process and device for the assembly of voussoirs for tunnel linings | Jean-Claude Hauer | 1982-03-09 |