AM

Alan J. Marshall

SI Smith International: 9 patents #70 of 708Top 10%
📍 Lost Creek, WV: #1 of 6 inventorsTop 20%
🗺 West Virginia: #268 of 3,425 inventorsTop 8%
Overall (All Time): #570,288 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
9605485 Percussion drilling assembly and hammer bit with gage and outer row reinforcement Shantanu N. Swadi, Angelo Spedale, Charles H. Dewey 2017-03-28
8763729 Percussion drilling assembly and hammer bit with gage and outer row reinforcement Shantanu N. Swadi, Angelo Spedale, Charles H. Dewey 2014-07-01
8657040 Percussion drilling assembly and locking system therefor Shantanu N. Swadi, James A. Simson 2014-02-25
8387725 Percussion drilling assembly and hammer bit with gage and outer row reinforcement Shantanu N. Swadi, Angelo Spedale, Charles H. Dewey 2013-03-05
8312613 Percussion drilling assembly with annular locking member 2012-11-20
8312944 Percussion hammer bit with a driver sub including a guide sleeve portion Shantanu N. Swadi, Michael S. Krauel 2012-11-20
8061450 Percussion drilling assembly having erosion retarding casing 2011-11-22
7997346 Percussion drilling assembly with annular locking member 2011-08-16
7428938 Percussion bit drill drive collar with retention mechanism and method of assembling 2008-09-30