Inventor
GOPAL RAVI B
CA13 patents
Patents
13 patentsUS6519539B1Feb 11, 2003
Measurement of fuel cell impedance
HYDROGENICS CORP57 citations94
US6787254B2Sep 7, 2004
Method and apparatus for humidification and temperature control of incoming fuel cell process gas
HYDROGENICS CORP19 citations91
US6619054B1Sep 16, 2003
Condenser for dehumidifying gas
HYDROGENICS CORP52 citations91
US6816797B2Nov 9, 2004
System and method for measuring fuel cell voltage and high frequency resistance
HYDROGENICS CORP28 citations90
US7077187B2Jul 18, 2006
Apparatus for exchanging energy and/or mass
HYDROGENICS CORP13 citations83
US6978224B2Dec 20, 2005
Alarm recovery system and method for fuel cell testing systems
HYDROGENICS CORP7 citations73
US7261150B2Aug 28, 2007
Apparatus for humidification and temperature control of incoming fuel cell process gas
HYDROGENICS CORP5 citations72
US7051801B1May 30, 2006
Method and apparatus for humidification and temperature control of incoming fuel cell process gas
HYDROGENICS CORP7 citations72
US7148654B2Dec 12, 2006
Method and apparatus for monitoring fuel cell voltages
HYDROGENICS CORP8 citations71
US7149641B2Dec 12, 2006
System and method for controlling a fuel cell testing device
HYDROGENICS CORP5 citations69
US7425832B2Sep 16, 2008
System and method for measuring internal resistance of electrochemical devices
HYDROGENICS CORP8 citations65
US6916567B2Jul 12, 2005
Regenerative dryer device and method for water recovery, primarily in the cathode side, of a proton exchange membrane fuel cell
HYDROGENICS CORP3 citations62
US7052791B2May 30, 2006
Apparatus for humidification and temperature control of incoming fuel cell process gas
HYDROGENICS CORP0 citations40