Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5037625 | Purified quartz and process for purifying quartz | Robert James | 1991-08-06 |
| 4983370 | Purified quartz and process for purifying quartz | Robert James | 1991-01-08 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5037625 | Purified quartz and process for purifying quartz | Robert James | 1991-08-06 |
| 4983370 | Purified quartz and process for purifying quartz | Robert James | 1991-01-08 |