DS

David R. Smale

SS Schlumberger Industires, S.A.: 1 patents #4 of 21Top 20%
Overall (1989): #121,670 of 140,708Top 90%
1
Patents 1989

Issued Patents 1989

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