DL

Dennis Mark Lettkeman

UG United States Gypsum: 1 patents #7 of 35Top 20%
📍 Broken Arrow, OK: #8 of 50 inventorsTop 20%
🗺 Oklahoma: #227 of 869 inventorsTop 30%
Overall (2016): #419,427 of 481,213Top 90%
1
Patents 2016

Issued Patents 2016

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9346996 Oil well cementing products with synthetic gypsum and methods John W. Wilson, Doug Blackburn, Brian K. Ball, Raymond A. Kaligian, Mike L. Cloud 2016-05-24