Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11739234 | Natural stone sealer compositions | Barry Culkin, Roger Questel, Robert Harrington, Paul Thottathil, Purushoth Kesavan +2 more | 2023-08-29 |
| 10532956 | Natural stone sealer compositions | Barry Culkin, Roger Questel, Robert Harrington, Paul Thottathil, Purushoth Kesavan +2 more | 2020-01-14 |
| D732375 | Switch plate assembly | Roger Questel | 2015-06-23 |
| D688935 | Switch plate assembly | Roger Questel | 2013-09-03 |