;  WO2008146118-A1 -- DE4132536-A1   ;  FR1421124-A   ;  JP2004055378-A   ;  US20020039648-A1   ;  US20030190519-A1   ;  EP2151001-A1 -- DE19944121-A1   ;  US2010119893-A1 -- US5360679-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  WATKINS D S,  COHEN R,  BUSWELL R F,  CLAUSI J V;  US20040137312-A1   ;  US20070190379-A1   ;  US20090325012-A1   ;  US6921597-B2   QUESTAIR TECHNOLOGIES INC (QUES-Non-standard)   KEEFER B G,  MCLEAN C R,  BROWN M J;  KR1133699-B1 -- DE4132536-A1   ;  KR2004088097-A   ;  US20020039648-A1   ;  US20030190519-A1   ;  JP5233166-B2 -- JP86233973-A   ;  JP93140775-A   ;  JP93186545-A   ;  JP95206745-A   ;  JP99144745-A   ;  JP2000169107-A   ;  JP2003515894-A   ENERGY VENTURES INC (ENER-Non-standard)   KORDESCH K,  HACKER V;  JP2005025959-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   KOZU K,  ICHINOSE T,  TAKADA M,  SHIBUTANI S;  JP2005087890-A   ;  JP2005108849-A   SAMSUNG DENKAN KK (SMSU)   CHOI K H;  JP2008034138-A   ;  JP73036050-B1   ;  WO2006003943-A1   TDK CORP (DENK)   SANO A,  MARUYAMA S;  CN101682056-B -- CN1532970-A   LG ELECTRONIC TIANJIN ELECTRIC APPLIANCE (GLDS)   ZHAO T,  PIAO M,  LI M;  CN2645248-Y   ;  DE4132536-A1   ;  WO2007020819-A1   TOYOTA JIDOSHA KK (TOYT)   KATANO K;  US8735007-B2 -- CN2645248-Y   ;  DE4132536-A1   ;  FR1421124-A   ;  JP05140775-A   ;  JP05186545-A   ;  JP07206745-A   ;  JP61233973-A   HITACHI LTD (HITA)   TSUKUI T,  YASUKAWA S;  JP2000169107-A   ;  JP2002008706-A   ;  JP2004055378-A   ;  JP2005025959-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   KOZU K,  ICHINOSE T,  TAKADA M,  SHIBUTANI S;  JP2005087890-A   ;  JP2005108849-A   SAMSUNG DENKAN KK (SMSU)   CHOI K H;  JP2006236776-A   ;  JP2008034138-A   ;  JP48036050-B1   ;  JP2003515894-W   ENERGY VENTURES INC (ENER-Non-standard)   KORDESCH K,  HACKER V;  US5360679-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  WATKINS D S,  COHEN R,  BUSWELL R F,  CLAUSI J V;  US20020039648-A1   ;  US20030190519-A1   ;  US20040137312-A1   ;  US20070190379-A1   ;  US20090325012-A1   ;  US6921597-B2   QUESTAIR TECHNOLOGIES INC (QUES-Non-standard)   KEEFER B G,  MCLEAN C R,  BROWN M J;  WO2007020819-A1   TOYOTA JIDOSHA KK (TOYT)   KATANO K;  WO2001039307-A2