Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838433 | Process for the separation of rock refuse and coal products | Gyula Kulcsar | 1989-06-13 |
| 4799738 | Mining method for working large-scale mineral deposits by the caving system | Karoly Barsi, Laszlo Kis-Tamas, Istvan Forisek, Laszlo Dorombozi, Otto Lukonits | 1989-01-24 |
| 4649031 | Process for recovering rare metals from the combustion residue of coal by digestion | Bela Matyas, Pal Gerber, Ferenc Kaszanitzky, Gyorgy Panto, Janos Leffler | 1987-03-10 |
| 4416566 | Supporting apparatus for the protection of mine gate crossings | Ferenc Szebenyi, Janos Nemeth, Jozsef Bohnert, Miklos Petrassy, Tamas Kovacs +2 more | 1983-11-22 |
| 4400035 | Process for the extraction of thick coal seams | Karoly Barsi, Hugo Salamon, Jozsef Takacs, Istvan Toth | 1983-08-23 |
| 4386657 | Process for the underground gasification of coal and carbonaceous materials | Jozsef Kiss, Jozsef Berczes, Karoly Szabo | 1983-06-07 |