Inventor · disambiguated record
Carl M. Hoffmaster
Also filed as: HOFFMASTER CARL · HOFFMASTER CARL M
19 granted patents·5 pending applications·392 citations·filing 1996–2024
95Inventor score
Technology areasE21B
Top patents by PatentIndex Score
24 records- 0193US7621348B2Drag bits with dropping tendencies and methods for making the sameSMITH INTERNATIONAL·Filed 2007·Granted Nov 24, 2009·52 cites·36 claims
- 0292US7703557B2Fixed cutter bit with backup cutter elements on primary bladesSMITH INTERNATIONAL·Filed 2007·Granted Apr 27, 2010·61 cites·49 claims
- 0389US8833492B2Cutters for fixed cutter bitsDURAIRAJAN BALA·Filed 2008·Granted Sep 16, 2014·32 cites·19 claims
- 0485US8783387B2Cutter geometry for high ROP applicationsDURAIRAJAN BALA·Filed 2008·Granted Jul 22, 2014·28 cites·16 claims
- 0584US9951563B2Wellbore mill having shear cutters and gouging cuttersSHEAR BITS LTD·Filed 2015·Granted Apr 24, 2018·6 cites·20 claims
- 0682US6880650B2Advanced expandable reaming toolSMITH INTERNATIONAL·Filed 2004·Granted Apr 19, 2005·45 cites·20 claims
- 0778US8127863B2Drill bit having enhanced stabilization features and method of use thereofDURAIRAJAN BALA·Filed 2008·Granted Mar 6, 2012·18 cites·30 claims
- 0871US7451836B2Advanced expandable reaming toolSMITH INTERNATIONAL·Filed 2001·Granted Nov 18, 2008·29 cites·19 claims
- 0971US6659207B2Bi-centered drill bit having enhanced casing drill-out capability and improved directional stabilitySMITH INTERNATIONAL·Filed 2001·Granted Dec 9, 2003·38 cites·41 claims
- 1070US9145739B2Fixed cutter drill bit for abrasive applicationsHOFFMASTER CARL·Filed 2011·Granted Sep 29, 2015·4 cites·42 claims
- 1169US7798256B2Fixed cutter drill bit for abrasive applicationsSMITH INTERNATIONAL·Filed 2006·Granted Sep 21, 2010·9 cites·82 claims
- 1267US8689908B2Drill bit having enhanced stabilization features and method of use thereofDURAIRAJAN BALA·Filed 2012·Granted Apr 8, 2014·3 cites·20 claims
- 1367US8100202B2Fixed cutter bit with backup cutter elements on secondary bladesDURAIRAJAN BALA·Filed 2009·Granted Jan 24, 2012·11 cites·76 claims
- 1463US10570664B2Wellbore reaming tool having shear cutters and gouging cuttersSHEAR BITS LTD·Filed 2018·Granted Feb 25, 2020·1 cites·19 claims
- 1559US7451837B2Advanced expandable reaming toolSMITH INTERNATIONAL·Filed 2004·Granted Nov 18, 2008·16 cites·18 claims
- 1654US12209459B2Wellbore reaming tool having fixed mounted gouging cuttersSHEAR BITS INC·Filed 2023·Granted Jan 28, 2025·0 cites·18 claims
- 1753US5839525ADirectional drill bitCAMCO INT·Filed 1996·Granted Nov 24, 1998·37 cites·19 claims
- 1852US2015047913A1Cutters for fixed cutter bitsSMITH INTERNATIONAL·Filed 2014·Application pending·0 cites
- 1951US11879295B2Gouging cutter drill bitSHEAR BITS INC·Filed 2021·Granted Jan 23, 2024·0 cites·29 claims
- 2050US9016407B2Drill bit cutting structure and methods to maximize depth-of-cut for weight on bit appliedDURAIRAJAN BALA·Filed 2008·Granted Apr 28, 2015·2 cites·39 claims
- 2149US2025230712A1Combination shear and gouging cutting element and well construction tools made therewithSHEAR BITS INC·Filed 2024·Application pending·0 cites
- 2245US2011005837A1Fixed cutter drill bit for abrasive applicationsSMITH INTERNATIONAL·Filed 2010·Application pending·0 cites
- 2341US2010018780A1Pdc bit having split bladesSMITH INTERNATIONAL·Filed 2009·Application pending·0 cites
- 2440US2013153306A1Fixed cutter drill bit heel and back-ream cutter protections for abrasive applicationsSMITH INTERNATIONAL·Filed 2012·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Carl M. Hoffmaster files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →