Inventor · disambiguated record
Christopher G. Estkowski
Also filed as: ESTKOWSKI CHRISTOPHER · ESTKOWSKI CHRISTOPHER G · ESTKOWSKI CHRISTOPHER GORDON
19 granted patents·4 pending applications·364 citations·filing 1986–2025
95Inventor score
Files withSHEPHERD PRODUCTS US8APPLIED RES ASSOCIATES INC2ESTKOWSKI CHRISTOPHER2MATULA PAUL A2SURGIQUEST INC2
Top patents by PatentIndex Score
23 records- 0196US8088189B2Multi-flow filtration systemMATULA PAUL A·Filed 2011·Granted Jan 3, 2012·31 cites·16 claims
- 0295US7976598B2Multi-flow filtration systemSURGIQUEST INC·Filed 2009·Granted Jul 12, 2011·32 cites·72 claims
- 0392US10835704B1Reusable respiratory protection deviceAPPLIED RES ASSOCIATES INC·Filed 2020·Granted Nov 17, 2020·20 cites·20 claims
- 0492USRE44972EMulti-flow filtration systemSURGIQUEST INC·Filed 2012·Granted Jul 1, 2014·11 cites·16 claims
- 0587USD692555SRespiratory device filterMAKSYM GEOFFREY NICHOLAS·Filed 2010·Granted Oct 29, 2013·67 cites·1 claims
- 0686US8974569B2Multi-flow filtration systemMATULA PAUL A·Filed 2011·Granted Mar 10, 2015·24 cites·14 claims
- 0776USD321299SChair baseSHEPHERD PRODUCTS US·Filed 1988·Granted Nov 5, 1991·16 cites·1 claims
- 0875US5068943ADual wheel tilted axle caster with an integral retainer and bearing assemblySHEPHERD PRODUCTS US·Filed 1990·Granted Dec 3, 1991·36 cites·6 claims
- 0972US4696394AEasily removable protective covering for annular objectsSHEPHERD PRODUCTS US·Filed 1986·Granted Sep 29, 1987·23 cites·2 claims
- 1067US12337200B2Respirator apparatusESTKOWSKI CHRISTOPHER·Filed 2023·Granted Jun 24, 2025·0 cites·18 claims
- 1167US6783566B2Combination filter/cartridge assemblySCOTT TECH INC·Filed 2001·Granted Aug 31, 2004·12 cites·12 claims
- 1263US11642487B2Reusable respiratory protection deviceAPPLIED RES ASSOCIATES INC·Filed 2020·Granted May 9, 2023·0 cites·20 claims
- 1361US5230571ACaster bearing assemblySHEPHERD PRODUCTS US·Filed 1992·Granted Jul 27, 1993·20 cites·7 claims
- 1457USD308815SCaster with arcurate hood coverSHEPHERD PRODUCTS US·Filed 1988·Granted Jun 26, 1990·8 cites·1 claims
- 1557US2025281775A1Respirator apparatusESTKOWSKI CHRISTOPHER·Filed 2025·Application pending·0 cites
- 1656US9352268B2Filter asssembly for a respiratorAVON PROTECTION SYSTEMS INC·Filed 2013·Granted May 31, 2016·1 cites·15 claims
- 1753US5226739AIntegral retainer and bearing assemblySHEPHERD PRODUCTS US·Filed 1991·Granted Jul 13, 1993·15 cites·3 claims
- 1850US5075924ATilted axle multiple wheel casterSHEPPERD PRODUCTS U S INC·Filed 1990·Granted Dec 31, 1991·18 cites·9 claims
- 1948US4763383AElectrically conductive caster having loop depending ringsSHEPHERD PRODUCTS US·Filed 1987·Granted Aug 16, 1988·14 cites·2 claims
- 2045US5232265AVertical back adjust for chairsSHEPHERD PRODUCTS US·Filed 1992·Granted Aug 3, 1993·16 cites·9 claims
- 2141US2020206544A1Hoods, respirator hoods, and other articles including joined thermoplastics and elastomers, and related methodsELMRIDGE PROT PRODUCTS LLC·Filed 2018·Application pending·0 cites
- 2240US2008053447A1Adapter for air purifying filterRATAJCZAK JOHN A·Filed 2007·Application pending·0 cites
- 2335US2013133663A1Respiratory Device FilterMAKSYM GEOFFREY N·Filed 2011·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →