JC

John M. Coogler

GE Geosource: 2 patents #7 of 55Top 15%
Overall (All Time): #2,358,764 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4458344 Tapered geophone spring 1984-07-03
4323994 Geophone spring 1982-04-06