DL

Dennis Mark Lettkeman

UG United States Gypsum: 2 patents #9 of 48Top 20%
📍 Broken Arrow, OK: #4 of 53 inventorsTop 8%
🗺 Oklahoma: #110 of 936 inventorsTop 15%
Overall (2018): #154,242 of 503,207Top 35%
2
Patents 2018

Issued Patents 2018

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9975808 Ultra-light cementitious compositions and related methods John W. Wilson, William Kelly Bedwell, Gary F. Miller, Raymond A. Kaligian 2018-05-22
9944556 Compositions with synthetic gypsum and methods John W. Wilson, Mike L. Cloud, Brian K. Ball, Raymond A. Kaligian, Doug Blackburn 2018-04-17