DR

Douglas Rock

SI Smith International: 2 patents #259 of 708Top 40%
📍 Houston, TX: #8,651 of 21,073 inventorsTop 45%
🗺 Texas: #52,441 of 125,132 inventorsTop 45%
Overall (All Time): #2,137,675 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7571778 Method of drilling a bore hole — 2009-08-11
7284623 Method of drilling a bore hole — 2007-10-23