Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4634049 | Concrete crosstie with recesses and method for the production thereof | Horst E. Steinfeld | 1987-01-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4634049 | Concrete crosstie with recesses and method for the production thereof | Horst E. Steinfeld | 1987-01-06 |