WO2004107488-A1 -- US4533455-A   ORONZIO DE NORA IMPIANTI ELETR (ORON)   BALKO E N,  MOULTHROP L C;  US20020055027-A1   ;  US6440597-B1   TOYOTA JIDOSHA KK (TOYT)   MIZUNO S;  US2006068263-A1 -- US4533455-A   ORONZIO DE NORA IMPIANTI ELETR (ORON)   BALKO E N,  MOULTHROP L C;  US20010019791-A1   ;  US20020055027-A1   ;  US20020055032-A1   ;  US20020106954-A1   ;  US6261711-B1   PLUG POWER INC (PLUG-Non-standard)   MATLOCK R R,  BUESING D G;  US6337120-B1   NOK CORP (NIOD)   SENDA K,  NAGAI O,  WAKAMATSU S,  ANDO O,  FUJIMOTO T;  US6338492-B1   FREUDENBERG FA CARL (FREU)   SCHILLING H,  HOFMANN G,  BOCK E;  US6440597-B1   TOYOTA JIDOSHA KK (TOYT)   MIZUNO S;  EP1649533-A1 -- DE10121176-A1   HONDA GIKEN KOGYO KK (HOND)   HATANO H,  SUENAGA T,  KIMURA N,  INOUE M;  US20030031914-A1   ;  US6261711-B1   PLUG POWER INC (PLUG-Non-standard)   MATLOCK R R,  BUESING D G;  WO2003007408-A1   HONDA GIKEN KOGYO KK (HOND)   MACHIDA A;  JP4331719-B2 -- JP2002042835-A   ;  JP2002246044-A   HONDA GIKEN KOGYO KK (HOND)   HATANO H,  KIMURA N,  INOUE M,  TANAKA H;  EP1649533-B1 -- DE10121176-A1   HONDA GIKEN KOGYO KK (HOND)   HATANO H,  SUENAGA T,  KIMURA N,  INOUE M;  US4533455-A   ORONZIO DE NORA IMPIANTI ELETR (ORON)   BALKO E N,  MOULTHROP L C;  US20020055027-A1   ;  US20020055032-A1   ;  US20030031914-A1   ;  US6261711-B1   PLUG POWER INC (PLUG-Non-standard)   MATLOCK R R,  BUESING D G;  US6440597-B1   TOYOTA JIDOSHA KK (TOYT)   MIZUNO S;  WO2003007408-A1   HONDA GIKEN KOGYO KK (HOND)   MACHIDA A;  US8420273-B2 -- DE10121176-A1   HONDA GIKEN KOGYO KK (HOND)   HATANO H,  SUENAGA T,  KIMURA N,  INOUE M;  EP1416555-A1   HONDA GIKEN KOGYO KK (HOND)   MACHIDA A;  JP2002042835-A   ;  JP2002246044-A   HONDA GIKEN KOGYO KK (HOND)   HATANO H,  KIMURA N,  INOUE M,  TANAKA H;  JP2003017093-A   ;  US4533455-A   ORONZIO DE NORA IMPIANTI ELETR (ORON)   BALKO E N,  MOULTHROP L C;  US20010019791-A1   ;  US20020055027-A1   ;  US20020055032-A1   ;  US20020106954-A1   ;  US20030031914-A1   ;  US6261711-B1   PLUG POWER INC (PLUG-Non-standard)   MATLOCK R R,  BUESING D G;  US6337120-B1   NOK CORP (NIOD)   SENDA K,  NAGAI O,  WAKAMATSU S,  ANDO O,  FUJIMOTO T;  US6338492-B1   FREUDENBERG FA CARL (FREU)   SCHILLING H,  HOFMANN G,  BOCK E;  US6440597-B1   TOYOTA JIDOSHA KK (TOYT)   MIZUNO S;  US6699613-B2   HONDA GIKEN KOGYO KK (HOND)   HATANO H,  SUENAGA T,  KIMURA N,  INOUE M;  WO2003007408-A1   HONDA GIKEN KOGYO KK (HOND)   MACHIDA A