Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349230 | Tunnel boring machine | Robert G. Dillingham | 1982-09-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349230 | Tunnel boring machine | Robert G. Dillingham | 1982-09-14 |