Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8023273 | Electric device having a plastic plug part arranged on a circuit support | Leopold Hellinger, Anton Kocevar, Gerhard Neumann | 2011-09-20 |
| 4772205 | Tactile braille or graphic display | Leopold Hellinger, Christian Kauer | 1988-09-20 |
| 4586904 | Device for forming tactile display | — | 1986-05-06 |