Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856940 | Lemniscate mining supports | Jerzy Cieslik, Marek Flak, Eugeniusz Kuczka, Franciszek Oles, Zdsizlaw Marszycki | 1989-08-15 |
| 4257649 | Coal combine | Janusz Sedlaczek, Marian Krutki | 1981-03-24 |