Inventor · disambiguated record
Robert L. Koelzer
Also filed as: KOELZER ROBERT · KOELZER ROBERT L
23 granted patents·3 pending applications·359 citations·filing 1992–2021
96Inventor score
Files withHALDEX BRAKE CORP10HALDEX BRAKE PRODUCTS CORP7MIDLAND BRAKE INC5HALDEX FINANCIAL SERVICES CORP1KOELZER ROBERT L1
Top patents by PatentIndex Score
26 records- 0191US8973922B2Air suspension height control valve with dual ride height positionsHALDEX BRAKE PRODUCTS CORP·Filed 2013·Granted Mar 10, 2015·21 cites·26 claims
- 0289US5236250AFull-function valve for heavy duty semi-trailer brake systemsMIDLAND BRAKE INC·Filed 1992·Granted Aug 17, 1993·40 cites·15 claims
- 0388US6785980B1Compressed air supply systemHALDEX BRAKE CORP·Filed 2003·Granted Sep 7, 2004·28 cites·16 claims
- 0486US6439857B1Axial piston compressorHALDEX BRAKE CORP·Filed 2001·Granted Aug 27, 2002·35 cites·20 claims
- 0584US7784879B2Electronic control air management with parking brake and trailer supply controlHALDEX BRAKE CORP·Filed 2002·Granted Aug 31, 2010·22 cites·10 claims
- 0684US6247764B1Full function valve for heavy duty semi-trailer brake systemsHALDEX BRAKE CORP·Filed 1999·Granted Jun 19, 2001·37 cites·19 claims
- 0779US5425572AQuick-release valve for a vehicle air release brake systemMIDLAND BRAKE INC·Filed 1993·Granted Jun 20, 1995·26 cites·12 claims
- 0872US11338786B2Spring brake actuator with diaphragm retainerHALDEX BRAKE PRODUCTS CORP·Filed 2021·Granted May 24, 2022·0 cites·23 claims
- 0970US6238013B1Solenoid-activated contaminant ejecting relay valveHALDEX BRAKE CORP·Filed 1999·Granted May 29, 2001·28 cites·10 claims
- 1069US10889280B2Spring brake actuator with diaphragm retainerHALDEX BRAKE PRODUCTS CORP·Filed 2016·Granted Jan 12, 2021·1 cites·16 claims
- 1169US10315636B2Tractor protection valveHALDEX BRAKE PRODUCTS CORP·Filed 2017·Granted Jun 11, 2019·1 cites·23 claims
- 1267US5947239AContaminant-ejecting relay valve for a pneumatic brake systemHALDEX FINANCIAL SERVICES CORP·Filed 1996·Granted Sep 7, 1999·22 cites·13 claims
- 1367US5466053AFull-function valve for tandem trailer brake systemMIDLAND BRAKE INC·Filed 1994·Granted Nov 14, 1995·29 cites·13 claims
- 1466US7048000B2Pressure reducing valveHALDEX BRAKE CORP·Filed 2004·Granted May 23, 2006·11 cites·19 claims
- 1565US11105431B2Reservoir purge valveHALDEX BRAKE PRODUCTS CORP·Filed 2019·Granted Aug 31, 2021·0 cites·19 claims
- 1664US5709246ABooster valve with contaminant ejection for use in a pneumatic brake systemMIDLAND BRAKE INC·Filed 1996·Granted Jan 20, 1998·23 cites·15 claims
- 1762US7318709B2Pump valve assemblyHALDEX BRAKE CORP·Filed 2003·Granted Jan 15, 2008·7 cites·17 claims
- 1861US11460083B2Systems and methods for sensing a brake component with an acoustic sensorHALDEX BRAKE PRODUCTS CORP·Filed 2020·Granted Oct 4, 2022·0 cites·9 claims
- 1960US7153105B2Compressor with swash plate housing inlet portHALDEX BRAKE CORP·Filed 2003·Granted Dec 26, 2006·6 cites·20 claims
- 2058US6883416B2Swash plate containment assemblyHALDEX BRAKE CORP·Filed 2003·Granted Apr 26, 2005·7 cites·27 claims
- 2154US10502329B2Reservoir purge valveHALDEX BRAKE PRODUCTS CORP·Filed 2015·Granted Dec 10, 2019·0 cites·20 claims
- 2252US5417479AFull-function valve for heavy duty semi-trailer brake systemMIDLAND BRAKE INC·Filed 1993·Granted May 23, 1995·15 cites·18 claims
- 2343US2005061143A1Modular swash plate compressorFiled 2004·Application pending·0 cites
- 2442US7249556B2Compressor with fortified piston channelHALDEX BRAKE CORP·Filed 2004·Granted Jul 31, 2007·0 cites·20 claims
- 2542US2005207905A1Fixed angle swash plate compressorKOELZER ROBERT L·Filed 2004·Application pending·0 cites
- 2640US2005057094A1System for regulating the supply of power to a brake systemFiled 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →