Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5272749 | Telephone dialing system for converting subscriber-created telephone numbers to directory numbers | — | 1993-12-21 |
| 4500446 | Mixed unsaturated monocarboxylic acid esters of 2,2,6,6-tetramethyl-4-piperidinol and of its ammonium carboxylate as stabilizer against UV in polymeric materials | Julius Durmis, Alojz Balogh, Milan Karvas, Maria Hrachovcova, Pavol Caucik +1 more | 1985-02-19 |