Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5296686 | Heating element | Christian Ullrich | 1994-03-22 |
| 5096479 | Method of enhancing fused quartz body purity | Joseph I. H. Allen, Ian George Sayce | 1992-03-17 |
| 4874417 | Method of purifying vitreous silica | — | 1989-10-17 |
| 4759787 | Method of purifying molten silica | — | 1988-07-26 |