ES

Eric R. Schwelm

AG Abb Vetco Gray: 1 patents #67 of 165Top 45%
VG Vetco Gray: 1 patents #168 of 364Top 50%
Overall (All Time): #2,304,054 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5240076 Casing tension retainer Stephen A. Cromar, Garry Stephen, Norman Brammer, Ian Calder 1993-08-31
5002131 Casing tensioning mechanism for a casing hanger Stephen A. Cromar, Garry Stephen 1991-03-26