Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8801852 | Additives in gypsum slurries and adjusting their proportions | Chris C. Lee, Alfred C. Li, David R. Blackburn, James R. Wittbold, Brent E. Groza | 2014-08-12 |
| 8597426 | Additives in gypsum panels and adjusting their proportions | Chris C. Lee, Alfred C. Li, David R. Blackburn, James R. Wittbold, Brent E. Groza | 2013-12-03 |
| 7296919 | Slurry mixer constrictor valve | Bruce L. Petersen, James R. Wittbold | 2007-11-20 |
| 7007914 | Slurry mixer constrictor valve | Bruce L. Petersen, James R. Wittbold | 2006-03-07 |