Inventor · disambiguated record
Zilek Liberfarb
Also filed as: LIBERFARB ZILEK · LIBERFARB ZILEK B
12 granted patents·3 pending applications·343 citations·filing 1978–2007
93Inventor score
Files withHYDRAFORCE INC5PARKER HANNIFIN CORP4FLUID POWER IND INC2PARKER HANNIFIN CORP AN OHIO C2LJUBIMOV BORIS A1
Top patents by PatentIndex Score
15 records- 0196US6286535B1Proportional pressure control valvePARKER HANNIFIN CORP·Filed 2000·Granted Sep 11, 2001·45 cites·30 claims
- 0296US5836335AProportional pressure control valveFLUID POWER IND INC·Filed 1996·Granted Nov 17, 1998·78 cites·9 claims
- 0388US6571828B2Proportional pressure control valvePARKER HANNIFIN CORP·Filed 2002·Granted Jun 3, 2003·25 cites·7 claims
- 0486US6966329B2Proportional pilot-operated flow control valveHYDRAFORCE INC·Filed 2004·Granted Nov 22, 2005·54 cites·16 claims
- 0583US7063100B2Flow regulator with pressure relief combination valveHYDRAFORCE INC·Filed 2004·Granted Jun 20, 2006·45 cites·17 claims
- 0681US7261030B2Method and system for improving stability of hydraulic systems with load senseHYDRAFORCE INC·Filed 2005·Granted Aug 28, 2007·16 cites·12 claims
- 0779US6405746B2Proportional pressure control valvePARKER HANNIFIN CORP·Filed 2001·Granted Jun 18, 2002·11 cites·5 claims
- 0877US6167906B1Bi-directional flow control valveHYDRAFORCE INC·Filed 1999·Granted Jan 2, 2001·25 cites·13 claims
- 0969US6116263AProportional priority flow regulator with reverse flow controlHYDRAFORCE INC·Filed 1999·Granted Sep 12, 2000·19 cites·15 claims
- 1054US6926033B2Proportional pressure control valvePARKER HANNIFIN CORP·Filed 2004·Granted Aug 9, 2005·3 cites·17 claims
- 1152US5564676ASolenoid valve assemblyFLUID POWER IND INC·Filed 1995·Granted Oct 15, 1996·19 cites·16 claims
- 1248US2008017261A1Proportional pressure control valvePARKER HANNIFIN CORP AN OHIO C·Filed 2007·Application pending·0 cites
- 1345US2005173008A1Proportional pressure control valvePARKER HANNIFIN CORP AN OHIO C·Filed 2005·Application pending·0 cites
- 1439US2003188788A1Proportional pressure control valveFiled 2003·Application pending·0 cites
- 1522US4270349ADistributing device of vehicle hydraulic control systemLJUBIMOV BORIS A·Filed 1978·Granted Jun 2, 1981·3 cites·3 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →