DU

Don C. Underwood

FM Fmc: 2 patents #531 of 1,735Top 35%
Overall (All Time): #2,321,637 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4900041 Subsea well casing hanger packoff system Bob C. Hopkins, Randy J. Wester 1990-02-13
4836579 Subsea casing hanger suspension system Randy J. Wester, Bob C. Hopkins 1989-06-06