Inventor · disambiguated record
Clyde A. Willis
Also filed as: WILLIS CLYDE A
23 granted patents·1 pending application·1,787 citations·filing 1977–2007
97Inventor score
Top patents by PatentIndex Score
24 records- 0196US4280535AInner tube assembly for dual conduit drill pipeWALKER NEER MFG CO·Filed 1979·Granted Jul 28, 1981·99 cites·34 claims
- 0295US4821814ATop head drive assembly for earth drilling machine and components thereofAPACHE CORP·Filed 1987·Granted Apr 18, 1989·167 cites·27 claims
- 0394US5036927AApparatus for gripping a down hole tubular for rotationAPACHE CORP·Filed 1990·Granted Aug 6, 1991·198 cites·15 claims
- 0494US4759414AModular drilling machine and components thereofAPACHE CORP·Filed 1987·Granted Jul 26, 1988·145 cites·23 claims
- 0593US4403897ASelf-centering clamp for down-hole tubularsWALKER NEER MFG CO·Filed 1980·Granted Sep 13, 1983·110 cites·35 claims
- 0692US5297833AApparatus for gripping a down hole tubular for support and rotationAPACHE CORP·Filed 1993·Granted Mar 29, 1994·262 cites·14 claims
- 0791US4821816AMethod of assembling a modular drilling machineAPACHE CORP·Filed 1988·Granted Apr 18, 1989·108 cites·2 claims
- 0891US4403666ASelf centering tongs and transfer arm for drilling apparatusWALKER NEER MFG CO·Filed 1981·Granted Sep 13, 1983·96 cites·31 claims
- 0990US5294228AAutomatic sequencing system for earth drilling machineAPACHE CORP·Filed 1991·Granted Mar 15, 1994·146 cites·5 claims
- 1090US4407629ALifting apparatus for down-hole tubularsWALKER NEER MFG CO·Filed 1980·Granted Oct 4, 1983·89 cites·20 claims
- 1183US4314611AApparatus for supporting and rotating a down hole tubularWALKER NEER MFG CO·Filed 1980·Granted Feb 9, 1982·44 cites·23 claims
- 1281US4509606AAxial return hammerWALKER NEER MFG CO·Filed 1983·Granted Apr 9, 1985·56 cites·7 claims
- 1380US4168755ANutating drill bitWALKER NEER MFG CO·Filed 1977·Granted Sep 25, 1979·46 cites·18 claims
- 1478US4815546ATop head drive assembly with axially movable quillAPACHE CORP·Filed 1987·Granted Mar 28, 1989·54 cites·28 claims
- 1574US4366606ASelf-centering clamp for down-hole tubularsWALKER NEER MFG CO·Filed 1980·Granted Jan 4, 1983·44 cites·14 claims
- 1669US5259723AFeeding device for down hole tubularsAPACHE CORP·Filed 1991·Granted Nov 9, 1993·28 cites·7 claims
- 1759US4650236AAutomatic pipe elevatorAPACHE CORP·Filed 1985·Granted Mar 17, 1987·27 cites·31 claims
- 1851US4274497ASkirted hammer sub for dual tube drillingWALKER NEER MFG CO·Filed 1977·Granted Jun 23, 1981·15 cites·13 claims
- 1945US4830119ATop head drive cooling systemAPACHE CORP·Filed 1988·Granted May 16, 1989·16 cites·27 claims
- 2044US4842250ALine reeving system for earth drilling machineAPACHE CORP·Filed 1987·Granted Jun 27, 1989·15 cites·25 claims
- 2143US4511169ASelf locking and unlocking elevator assemblyWALKER NEER MFG CO·Filed 1982·Granted Apr 16, 1985·12 cites·24 claims
- 2240US2009121507A1Apparatus for gripping a down hole tubular for use in a drilling machineWILLIS CLYDE A·Filed 2007·Application pending·0 cites
- 2330US4407373ACollapsible pedestal for drilling apparatusWALKER NEER MFG CO·Filed 1981·Granted Oct 4, 1983·3 cites·7 claims
- 2429US5273388ALifting device for down hole tubularsAPACHE CORP·Filed 1991·Granted Dec 28, 1993·7 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →