Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4192479 | Mine prop construction | Herbert Friebe, deceased, by Axel Rodert, administrator | 1980-03-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4192479 | Mine prop construction | Herbert Friebe, deceased, by Axel Rodert, administrator | 1980-03-11 |