Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4406565 | Slidable filling dam | Wojciech Skoczynski, Edward Janik, Henryk Zych, Ryszard Serwotka | 1983-09-27 |
| 4293248 | Walking roof support | Edward Rozmus, Zbigniew Korecki, Stanislaw Karmanski | 1981-10-06 |