Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4689172 | Process of surface treating luminescent materials | Sandor Lukacs, Tamas Palotai, Tibor Lakatos, Gyorgy Bakdos | 1987-08-25 |
| 4610217 | Apparatus for electrostatic spraying of the insides of lamp envelopes | Miklos Keri, Bela Balogh, Erno Fejes, Istvan Kallai, Sandor Lukacs | 1986-09-09 |
| 4421803 | Glass envelope for electric light sources | Istvan Kallai, Laszlo Simenfalvi | 1983-12-20 |