Issued Patents 2016
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9476301 | Mine ventilation door with wings and slidable or pocket personnel door | Daniel S. Zenisek | 2016-10-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9476301 | Mine ventilation door with wings and slidable or pocket personnel door | Daniel S. Zenisek | 2016-10-25 |