Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4278296 | Coal mining drum with adjustable linier edge cutters | Karl Bortz, Friedrich Eichbaum | 1981-07-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4278296 | Coal mining drum with adjustable linier edge cutters | Karl Bortz, Friedrich Eichbaum | 1981-07-14 |