Issued Patents 2021
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11186066 | Gypsum board from gypsum having high level of chloride salt and a perforated sheet and methods associated therewith | Mark Hemphill, Qinghua Li | 2021-11-30 |
| 11186067 | Gypsum board from gypsum having high level of chloride salt and a starch layer and methods associated therewith | Qinghua Li, Runhai Lu, Mark Hemphill | 2021-11-30 |
| 11068037 | Device having main and backup power | David P. Mohr | 2021-07-20 |
| 11029139 | Wallboard score, snap and edge appearance test procedure | Jerry D. Wonderlich, John A. Koch, Tim Lucas, Jenner Omodt | 2021-06-08 |