Inventor · disambiguated record
John Matthews
Also filed as: MATTHEWS JOHN · MATTHEWS JOHN H
8 granted patents·1 pending application·94 citations·filing 1987–2015
86Inventor score
Top patents by PatentIndex Score
9 records- 0189US6585009B2System for periodic fluid maintenance of apparatusLUBRIZOL CORP·Filed 2002·Granted Jul 1, 2003·34 cites·2 claims
- 0285US6568436B1System for periodic fluid maintenance of apparatusLUBRIZOL CORP·Filed 2000·Granted May 27, 2003·23 cites·58 claims
- 0359US8251081B2Device for metering fluidsHICKS DALE·Filed 2007·Granted Aug 28, 2012·6 cites·20 claims
- 0452US6026991AApparatus, system, and method for additizing a liquid productLUBRIZOL CORP·Filed 1998·Granted Feb 22, 2000·18 cites·13 claims
- 0541US6647838B2Coupler toolLUBRIZOL CORP·Filed 2001·Granted Nov 18, 2003·3 cites·16 claims
- 0639US4872370APiston rod assembly including preloaded piston head and composite rodPNEUMO ABEX CORP·Filed 1987·Granted Oct 10, 1989·7 cites·14 claims
- 0735US2003102050A1System for periodic fluid maintenance of apparatusFiled 2003·Application pending·0 cites
- 0822US6244094B1Closed loop calibrator and process of calibrating a liquid metering device in a closed atmosphereLUBRIZOL CORP·Filed 1998·Granted Jun 12, 2001·3 cites·11 claims
- 0921US9947192B2Metal-theft detection devicePAN OPTIC MONITORING LTD·Filed 2015·Granted Apr 17, 2018·0 cites·21 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →