FV

Frederick A. Vitringa

GE Geosource: 2 patents #7 of 55Top 15%
Overall (All Time): #2,344,131 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4685094 Lateral compliance device for geophone springs Arend L. Hagedoorn 1987-08-04
4623991 Delta-shaped geophone spring — 1986-11-18