Inventor · disambiguated record
Robert A. Barr
Also filed as: BARR ROBERT A
10 granted patents·4 pending applications·262 citations·filing 1982–2020
91Inventor score
Top patents by PatentIndex Score
14 records- 0190US4405239AEnergy efficient extruder screwCHUNG CHAN I·Filed 1982·Granted Sep 20, 1983·62 cites·6 claims
- 0289US11285652B2No solid bed extruder screwBARR ROBERT A·Filed 2020·Granted Mar 29, 2022·2 cites·15 claims
- 0387US6599004B2Extruder screw with improved energy efficient meltingFiled 2001·Granted Jul 29, 2003·32 cites·20 claims
- 0483US6454454B1Polymer melting and extruding apparatus with linear downstream threadsFiled 2000·Granted Sep 24, 2002·22 cites·11 claims
- 0582US4779989ATransfer mixer assembly for use with an extruder screw of a polymer extruder or the likeBARR ROBERT A·Filed 1986·Granted Oct 25, 1988·45 cites·30 claims
- 0670US4558954AExtruder screw and positive displacement wave pump assemblyBARR ROBERT A·Filed 1984·Granted Dec 17, 1985·24 cites·20 claims
- 0769US4519712APositive displacement pump assemblyBARR ROBERT A·Filed 1984·Granted May 28, 1985·23 cites·8 claims
- 0861US5988866AFloating sleeve mixer and methodFiled 1998·Granted Nov 23, 1999·22 cites·11 claims
- 0960US4558991AWave pump assemblyBARR ROBERT A·Filed 1985·Granted Dec 17, 1985·17 cites·6 claims
- 1053US2014020157A1Soft safe helmetBARR ROBERT A·Filed 2013·Application pending·0 cites
- 1149US2019082769A1Helmet for playing sportsBARR ROBERT A·Filed 2018·Application pending·0 cites
- 1247US6254266B1Floating ring mixer for extruderBARR ROBERT A·Filed 1998·Granted Jul 3, 2001·13 cites·8 claims
- 1340US2018079126A1Independently driven device for use with plastic melt feed screwBARR ROBERT A·Filed 2016·Application pending·0 cites
- 1433US2015273753A1Reduced wear extruder screwBARR INC·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →