Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4231684 | Shield type support for use in underground mining with lemniscate guide rods | Harry Oppenlander | 1980-11-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4231684 | Shield type support for use in underground mining with lemniscate guide rods | Harry Oppenlander | 1980-11-04 |