Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6677260 | Ultraviolet absorbing and yellow light filtering glass article | Laura O. De Angelis, William L. Haynes, Ronald Leroy Stewart | 2004-01-13 |
| 6323585 | Ultraviolet absorbing and yellow light filtering glasses for lamp envelopes | Laura O. De Angelis, William L. Haynes, Ronald Leroy Stewart | 2001-11-27 |