DS

David R. Smale

SS Schlumberger Industires, S.A.: 1 patents #93 of 272Top 35%
Overall (All Time): #3,939,311 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4871886 Electronic key and receptacle therefor John E. Vaughan, Bernard Patry, John C. Heaton 1989-10-03