Inventor · disambiguated record
Bruce H. Burr
Also filed as: BURR BRUCE H · BURR BRUCE HAWLEY
13 granted patents·1 pending application·450 citations·filing 1981–2016
94Inventor score
Top patents by PatentIndex Score
14 records- 0188US4516641AEarth boring bit with pressure compensating rigid face sealHUGHES TOOL CO·Filed 1983·Granted May 14, 1985·84 cites·12 claims
- 0283US4899838AEarth boring bit with convergent cutter bearingHUGHES TOOL CO·Filed 1988·Granted Feb 13, 1990·67 cites·3 claims
- 0377US4666001AEarth boring bit with improved rigid face seal assemblyHUGHES TOOL CO·Filed 1985·Granted May 19, 1987·55 cites·18 claims
- 0473US4753303AEarth boring bit with two piece bearing and rigid face seal assemblyHUGHES TOOL CO·Filed 1987·Granted Jun 28, 1988·46 cites·15 claims
- 0570US6427790B1Rock bit face seal having lubrication gapSCHLUMBERGER TECHNOLOGY CORP·Filed 2001·Granted Aug 6, 2002·37 cites·21 claims
- 0667US4671368AEarth boring bit with shear compression sealHUGHES TOOL CO·Filed 1985·Granted Jun 9, 1987·27 cites·4 claims
- 0764US4404840ADevice for evaluating abrasive wear of elastomeric O-ring materialsBURR BRUCE H·Filed 1981·Granted Sep 20, 1983·23 cites·8 claims
- 0863US7036613B2Lip seal for roller cone drill bitREEDHYCALOG L P·Filed 2003·Granted May 2, 2006·26 cites·58 claims
- 0954US10161190B2Drill bit seal and method of using sameNAT OILWELL VARCO LP·Filed 2016·Granted Dec 25, 2018·0 cites·20 claims
- 1053US6247545B1Single energizer face seal for rocks bits with floating journal bearingsCAMCO INT·Filed 1999·Granted Jun 19, 2001·31 cites·17 claims
- 1153US6176330B1Rock bit face seal having anti-rotation pinsCAMCO INT·Filed 1999·Granted Jan 23, 2001·30 cites·17 claims
- 1250US2013319770A1Drill bit seal and method of using sameBURR BRUCE H·Filed 2012·Application pending·0 cites
- 1344US4519719AEarth boring bit with pressure compensating bearing sealHUGHES TOOL CO·Filed 1983·Granted May 28, 1985·13 cites·12 claims
- 1440US4491428AEarth boring drill bit with snap ring cutter retentionHUGHES TOOL CO·Filed 1981·Granted Jan 1, 1985·11 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →