Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863311 | Lining for bore holes in salt domes | Hans Pirk | 1989-09-05 |
| 4650518 | Container for the final storage of radioactive wastes | Hans Pirk, Horst Vietzke, Hans Wingender | 1987-03-17 |