Inventor · disambiguated record
Henry H. Leggett
Also filed as: LEGGETT HENRY · LEGGETT HENRY H
16 granted patents·4 pending applications·337 citations·filing 1986–2021
94Inventor score
Files withEASTERN OIL TOOLS PTE LTD5LEGGETT HENRY4LEGGETT HENRY H3ABRI TECH INC2DESIGN TRIFECTA LLC1
Top patents by PatentIndex Score
20 records- 0179US4886115AWireline safety mechanism for wireline toolsEASTERN OIL TOOLS PTE LTD·Filed 1988·Granted Dec 12, 1989·65 cites·23 claims
- 0278US5287879AHydraulically energized wireline blowout preventerEASTERN OIL TOOLS PTE LTD·Filed 1993·Granted Feb 22, 1994·76 cites·30 claims
- 0377US4938290AWireline blowout preventer having mechanical and hydraulic sealingEASTERN OIL TOOLS PTE LTD·Filed 1989·Granted Jul 3, 1990·60 cites·18 claims
- 0474US10030482B2Valve mechanism having tool trapNAT OILWELL VARCO LP·Filed 2015·Granted Jul 24, 2018·2 cites·16 claims
- 0572US10513660B2Compact fast pyrolysis system for conversion of carbonaceous materials to liquid, solid and gasABRI TECH INC·Filed 2017·Granted Dec 24, 2019·2 cites·6 claims
- 0670US4846272ADownhole shuttle valve for wellsEASTERN OIL TOLLS PTE LTD·Filed 1988·Granted Jul 11, 1989·46 cites·19 claims
- 0750US6394460B1One-piece ram element block for wireline blowout preventersTUBOSCOPE I P·Filed 1999·Granted May 28, 2002·31 cites·18 claims
- 0846US2015371741A1Method and apparatus for treating logging cableLEGGETT HENRY H·Filed 2014·Application pending·0 cites
- 0945US4828023AMechanical latching device operated by dead weight and tensionEASTERN OIL TOOLS PTE LTD·Filed 1988·Granted May 9, 1989·17 cites·8 claims
- 1042US4687055AWire-line controlled down-hole shut-in tool for wellsLEGGETT HENRY H·Filed 1986·Granted Aug 18, 1987·18 cites·17 claims
- 1139USD808230SKnife blockLEGGETT HENRY·Filed 2016·Granted Jan 23, 2018·2 cites·1 claims
- 1239USD808229SKnife blockLEGGETT HENRY·Filed 2016·Granted Jan 23, 2018·2 cites·1 claims
- 1338USD804916SKnife blockLEGGETT HENRY·Filed 2015·Granted Dec 12, 2017·2 cites·1 claims
- 1438US2022268437A1Universal mounting bracket deviceDESIGN TRIFECTA LLC·Filed 2021·Application pending·0 cites
- 1534USD804257SKnife blockLEGGETT HENRY·Filed 2015·Granted Dec 5, 2017·1 cites·1 claims
- 1632US5662312APressurized sheave mechanism for high pressure wireline serviceSCHLUMBERGER TECHNOLOGY CORP·Filed 1996·Granted Sep 2, 1997·7 cites·34 claims
- 1732US2015021159A1Compact fast pyrolysis system for conversion of carbonaceous materials to liquid, solid and gasABRI TECH INC·Filed 2013·Application pending·0 cites
- 1830US4883119AMechanical latching device operated by dead weight and tensionEASTERN OIL TOOLS PTE LTD·Filed 1988·Granted Nov 28, 1989·4 cites·8 claims
- 1929US6145807ABy-pass stud with integral safety valveHYDROLEX INC·Filed 1999·Granted Nov 14, 2000·2 cites·16 claims
- 2028US2017198970A1Method and apparatus for treating logging cableLEGGETT HENRY H·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →