AM

Alan J. Marshall

SI Smith International: 2 patents #11 of 94Top 15%
📍 Lost Creek, WV: #1 of 1 inventorsTop 100%
🗺 West Virginia: #15 of 220 inventorsTop 7%
Overall (2011): #113,429 of 364,097Top 35%
2
Patents 2011

Issued Patents 2011

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
8061450 Percussion drilling assembly having erosion retarding casing — 2011-11-22
7997346 Percussion drilling assembly with annular locking member — 2011-08-16