TM

Thomas E. McGraw

HA Halliburton: 1 patents #490 of 857Top 60%
Overall (All Time): #4,086,573 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4258793 Oil well testing string bypass valve John C. Zimmerman 1981-03-31