AG

Alfred J. Grainger

NI Nl Industries: 1 patents #92 of 213Top 45%
Overall (All Time): #2,352,798 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4553615 Rotary drilling bits — 1985-11-19
4511006 Drill bit and method of use thereof — 1985-04-16