Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7452611 | Photochromic optical article | William P. Blackburn, Michael B. Levesque, Kevin W. Seybert, Nancyanne Gruchacz | 2008-11-18 |
| 6506488 | Aminoplast resin photochromic coating composition and photochromic articles | Kevin J. Stewart, Cletus N. Welch, James B. O'Dwyer, Shanti Swarup | 2003-01-14 |
| 6432544 | Aminoplast resin photochromic coating composition and photochromic articles | Kevin J. Stewart, Cletus N. Welch, James B. O'Dwyer, Shanti Swarup | 2002-08-13 |
| 6187444 | Photochromic polyurethane coating and articles having such a coating | Robert J. Bowles, III, Nancyanne Gruchacz, Shanti Swarup, Robert W. Walters, Robin Hunt | 2001-02-13 |