Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884963 | Pulse combustor | — | 1989-12-05 |
| 4856558 | Flapper control valve | — | 1989-08-15 |
| 4813237 | Apparatus for making up feed water for a power station | Laszlo Szucs, Istvan Szabo, Istvan Papp, Jozsef Csaszni, Gyula Lengyel +2 more | 1989-03-21 |