Inventor · disambiguated record
Alan J. Marshall
Also filed as: MARSHALL ALAN J · MARSHALL ALAN JACKSON
9 granted patents·2 pending applications·41 citations·filing 2005–2014
85Inventor score
Top patents by PatentIndex Score
11 records- 0176US8312613B2Percussion drilling assembly with annular locking memberMARSHALL ALAN J·Filed 2011·Granted Nov 20, 2012·5 cites·9 claims
- 0276US7997346B2Percussion drilling assembly with annular locking memberSMITH INTERNATIONAL·Filed 2008·Granted Aug 16, 2011·8 cites·11 claims
- 0366US8763729B2Percussion drilling assembly and hammer bit with gage and outer row reinforcementSMITH INTERNATIONAL·Filed 2013·Granted Jul 1, 2014·2 cites·21 claims
- 0464US8312944B2Percussion hammer bit with a driver sub including a guide sleeve portionMARSHALL ALAN J·Filed 2009·Granted Nov 20, 2012·11 cites·13 claims
- 0564US7428938B2Percussion bit drill drive collar with retention mechanism and method of assemblingSMITH INTERNATIONAL·Filed 2006·Granted Sep 30, 2008·9 cites·9 claims
- 0652US9605485B1Percussion drilling assembly and hammer bit with gage and outer row reinforcementSMITH INTERNATIONAL·Filed 2014·Granted Mar 28, 2017·0 cites·21 claims
- 0746US8657040B2Percussion drilling assembly and locking system thereforMARSHALL ALAN JACKSON·Filed 2009·Granted Feb 25, 2014·3 cites·24 claims
- 0846US8061450B2Percussion drilling assembly having erosion retarding casingMARSHALL ALAN J·Filed 2008·Granted Nov 22, 2011·2 cites·19 claims
- 0944US8387725B2Percussion drilling assembly and hammer bit with gage and outer row reinforcementSWADI SHANTANU·Filed 2008·Granted Mar 5, 2013·1 cites·46 claims
- 1041US2016153236A1Percussion hammer bitMARSHALL ALAN J·Filed 2014·Application pending·0 cites
- 1136US2007137895A1Percussion drill bit with V-shaped splinesSMITH INTERNATIONAL·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →