Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5656560 | Bronze-tinted or grey-tinted soda lime silicate glass | Eberhard Stotzel, Ferdinand Klosel | 1997-08-12 |
| 5017521 | Borosilicate glass compositions incorporating cerium oxide | Kenneth Melvin Fyles | 1991-05-21 |