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Charles D. Calkins

📍 Tulsa, OK: #32 of 138 inventorsTop 25%
🗺 Oklahoma: #195 of 823 inventorsTop 25%
Overall (2003): #251,602 of 273,478Top 95%
1
Patents 2003

Issued Patents 2003

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6648562 Apparatus for tapping a hole in a pipeline Jerry Lee Dunn, David Albertson, Richard L. Goswick, Matthew W. James 2003-11-18