Inventor · disambiguated record
James W. Langford, Jr.
Also filed as: LANGFORD JAMES · LANGFORD JAMES W · LANGFORD JAMES WILSON · LANGFORD JR JAMES W
15 granted patents·3 pending applications·1,043 citations·filing 1975–2014
95Inventor score
Files withDRESSER IND10ATLAS COPCO SECOROC LLC2RAINEY ALLAN W2TERCEL IP LTD2EPIROC DRILLING TOOLS LLC1
Top patents by PatentIndex Score
18 records- 0195US4722405AWear compensating rock bit insertDRESSER IND·Filed 1986·Granted Feb 2, 1988·162 cites·39 claims
- 0295US4397361AAbradable cutter protectionDRESSER IND·Filed 1981·Granted Aug 9, 1983·138 cites·8 claims
- 0392US5755299AHardfacing with coated diamond particlesDRESSER IND·Filed 1995·Granted May 26, 1998·174 cites·27 claims
- 0491US4058177AAsymmetric gage insert for an earth boring apparatusDRESSER IND·Filed 1977·Granted Nov 15, 1977·94 cites·10 claims
- 0590US5620290AGround retainerILLINOIS TOOL WORKS·Filed 1995·Granted Apr 15, 1997·98 cites·20 claims
- 0689US4875532ARoller drill bit having radial-thrust pilot bushing incorporating anti-galling materialDRESSER IND·Filed 1988·Granted Oct 24, 1989·92 cites·25 claims
- 0787US5755298AHardfacing with coated diamond particlesDRESSER IND·Filed 1997·Granted May 26, 1998·117 cites·15 claims
- 0885US4086973AAsymmetric insert for inner row of an earth boring cutterDRESSER IND·Filed 1976·Granted May 2, 1978·59 cites·2 claims
- 0979US4256351ASealing system for a rolling cone cutter earth boring bitDRESSER IND·Filed 1978·Granted Mar 17, 1981·30 cites·2 claims
- 1077US3948330AVacuum, vacuum-pressure, or pressure reverse circulation bitDRESSER IND·Filed 1975·Granted Apr 6, 1976·40 cites·3 claims
- 1176US4934467ADrill bit wear resistant surface for elastomeric sealDRESSER IND·Filed 1988·Granted Jun 19, 1990·32 cites·17 claims
- 1257US8763728B2Percussion assisted rotary earth bit and method of operating the sameRAINEY ALLAN W·Filed 2010·Granted Jul 1, 2014·2 cites·24 claims
- 1353US8353369B2Percussion assisted rotary earth bit and method of operating the sameATLAS COPCO SECOROC LLC·Filed 2009·Granted Jan 15, 2013·3 cites·19 claims
- 1450US10024107B2Rotary drill bitEPIROC DRILLING TOOLS LLC·Filed 2012·Granted Jul 17, 2018·2 cites·18 claims
- 1550US2016281434A1Seal assembly and a roller cone drill bit comprising such a seal assemblyTERCEL IP LTD·Filed 2014·Application pending·0 cites
- 1645US2009078343A1Earthboring tool and method of casehardeningATLAS COPCO SECOROC LLC·Filed 2007·Application pending·0 cites
- 1744US8627903B2Percussion assisted rotary earth bit and method of operating the sameRAINEY ALLAN W·Filed 2012·Granted Jan 14, 2014·0 cites·16 claims
- 1844US2015368976A1Fixed-cutter drill bits generating coresTERCEL IP LTD·Filed 2014·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →