Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4537862 | Lead-free and cadmium-free glass frit compositions for glazing, enameling and decorating | Josef Francel, Daniel R. Stewart | 1985-08-27 |
| 4446241 | Lead-free and cadmium-free glass frit compositions for glazing, enameling and decorating | Josef Francel, Daniel R. Stewart | 1984-05-01 |