Inventor · disambiguated record
Gary D. Ellis
Also filed as: ELLIS GARY D · ELLIS GARY DALE
8 granted patents·292 citations·filing 1975–2011
89Inventor score
Top patents by PatentIndex Score
8 records- 0191US4363358ASubsurface tubing hanger and stinger assemblyDRESSER IND·Filed 1981·Granted Dec 14, 1982·137 cites·17 claims
- 0280US4691775AIsolation valve with frangible flapper elementDRESSER IND·Filed 1986·Granted Sep 8, 1987·66 cites·8 claims
- 0379US8505638B2Restricted axial movement locking mechanismEZELL MICHAEL DALE·Filed 2011·Granted Aug 13, 2013·7 cites·29 claims
- 0476US4372527ABlowout preventerDRESSER IND·Filed 1980·Granted Feb 8, 1983·31 cites·20 claims
- 0561US8002045B2Downhole tool with load diverting system and methodHALLIBURTON ENERGY SERV INC·Filed 2008·Granted Aug 23, 2011·7 cites·23 claims
- 0656US4305465ASubsurface tubing hanger and stinger assemblyDRESSER IND·Filed 1980·Granted Dec 15, 1981·23 cites·7 claims
- 0751US6924745B2System and method for monitoring packer slippageHALLIBURTON ENERGY SERV INC·Filed 2002·Granted Aug 2, 2005·13 cites·29 claims
- 0837US3951211AMethod for selectively retrieving a plurality of well packersDRESSER IND·Filed 1975·Granted Apr 20, 1976·8 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →