Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4309218 | Chemically durable phosphate opal glasses | John L. Stempin, Dale R. Wexell | 1982-01-05 |
| 4309219 | Phase separated, non-crystalline opal glasses | John L. Stempin, Dale R. Wexell | 1982-01-05 |