Inventor · disambiguated record
Howard Ervin
Also filed as: ERVIN HOWARD · ERVIN HOWARD L
5 granted patents·60 citations·filing 2006–2014
80Inventor score
Top patents by PatentIndex Score
5 records- 0184US7748473B2Top drives with shaft multi-sealNAT OILWELL VARCO LP·Filed 2008·Granted Jul 6, 2010·26 cites·17 claims
- 0279US7487848B2Multi-seal for top drive shaftVARCO INT·Filed 2006·Granted Feb 10, 2009·21 cites·8 claims
- 0377US8448320B2Clamp apparatus for threadedly connected tubularsYATER RONALD W·Filed 2010·Granted May 28, 2013·7 cites·16 claims
- 0462US10557540B2Fleet angle tolerant sheaveNAT OILWELL VARCO LP·Filed 2014·Granted Feb 11, 2020·2 cites·10 claims
- 0555US7784834B2Clamp apparatus for threadedly connected tubularsVARCO INT·Filed 2007·Granted Aug 31, 2010·4 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →