Inventor · disambiguated record
Roy D. Lister
Also filed as: LISTER ROY D
7 granted patents·1 pending application·118 citations·filing 1980–2011
86Inventor score
Top patents by PatentIndex Score
8 records- 0182US4857197ALiquid separator with tangential drive fluid introductionAMOCO CORP·Filed 1988·Granted Aug 15, 1989·43 cites·8 claims
- 0273US8955691B2Spiral ramp hydrocycloneLISTER ROY D·Filed 2011·Granted Feb 17, 2015·4 cites·5 claims
- 0369US5185087AMethod of concentrating and deodorizing ruminant wasteLISTER ROY D·Filed 1991·Granted Feb 9, 1993·27 cites·7 claims
- 0462US4324438ADrilling deck bushingEAGLE PICHER IND INC·Filed 1980·Granted Apr 13, 1982·18 cites·6 claims
- 0546US4786412AHydrocyclone having dewatering tubeEAGLE PICHER IND INC·Filed 1987·Granted Nov 22, 1988·12 cites·3 claims
- 0640US4818400ACyclone and filter belt apparatus for dewateringEAGLE PICHER IND INC·Filed 1987·Granted Apr 4, 1989·7 cites·3 claims
- 0739US4765887ASystem for joining sections of a hydrocyclone separatorEAGLE PICHER IND INC·Filed 1987·Granted Aug 23, 1988·7 cites·8 claims
- 0834US2003221558A1Apparatus and method for separation of gasesFiled 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →