US2009162726-A1 -- US5993987-A   BALLARD POWER SYSTEMS INC (BLRD)   WOZNICZKA B,  FLETCHER N J,  GIBB P R;  US20030162078-A1   ;  US6653008-B1   TOYOTA JIDOSHA KK (TOYT)   HIRAKATA S,  NISHIDA S,  AOTO A,  BISAKA T,  TANAKA H,  HOTTA Y;  US6855450-B2   PROTON ENERGY SYSTEMS (PROT-Non-standard)   MOLTER T M,  DRISTY M E;  WO2009085776-A1 -- DE102004027694-A1   DAIMLERCHRYSLER AG (DAIM)   BAMBERGER V,  BECKMANN J,  BLANK F,  HELLER C,  SCHMID O,  SCHUDY M;  JP2002343410-A   TOYOTA JIDOSHA KK (TOYT)   HOTTA Y;  JP2006049221-A   NISSAN MOTOR CO LTD (NSMO)   SAITO K;  US5993987-A   BALLARD POWER SYSTEMS INC (BLRD)   WOZNICZKA B,  FLETCHER N J,  GIBB P R;  US20030162078-A1   ;  US6653008-B1   TOYOTA JIDOSHA KK (TOYT)   HIRAKATA S,  NISHIDA S,  AOTO A,  BISAKA T,  TANAKA H,  HOTTA Y;  US2011003230-A1 -- US3134697-A   ;  US3297490-A   AMERICAN CYANAMID CO (AMCY);  US4057479-A   BILLINGS ENERGY RES (BILL-Non-standard)   CAMPBELL B C;  US4214969-A   GENERAL ELECTRIC CO (GENE);  UNITED TECHNOLOGIES CORP (UNAC)   LAWRANCE R J;  US4478917-A   HITACHI LTD (HITA)   FUJITA K,  TAMURA K,  KAWANA H,  IWAMOTO K,  HORIBA T;  US5486430-A   BALLARD POWER SYSTEMS INC (BLRD)   CHOW C Y,  GORBELL B N,  WOZNICZKA B M;  US5993987-A   BALLARD POWER SYSTEMS INC (BLRD)   WOZNICZKA B,  FLETCHER N J,  GIBB P R;  US20030162078-A1   ;  US6210823-B1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   HATOH K,  YASUMOTO E,  NISHIDA K,  GYOTEN H,  OHARA H,  UCHIDA M,  SUGAWARA Y,  KANBARA T,  MATSUMOTO T,  NAKAGAWA K;  US6653008-B1   TOYOTA JIDOSHA KK (TOYT)   HIRAKATA S,  NISHIDA S,  AOTO A,  BISAKA T,  TANAKA H,  HOTTA Y;  CN101904039-B -- US6653008-B1   TOYOTA JIDOSHA KK (TOYT)   HIRAKATA S,  NISHIDA S,  AOTO A,  BISAKA T,  TANAKA H,  HOTTA Y;  EP2232623-B1 -- DE102004027694-A1   DAIMLERCHRYSLER AG (DAIM)   BAMBERGER V,  BECKMANN J,  BLANK F,  HELLER C,  SCHMID O,  SCHUDY M;  JP2002343410-A   TOYOTA JIDOSHA KK (TOYT)   HOTTA Y;  JP2006049221-A   NISSAN MOTOR CO LTD (NSMO)   SAITO K;  US5993987-A   BALLARD POWER SYSTEMS INC (BLRD)   WOZNICZKA B,  FLETCHER N J,  GIBB P R;  US20030162078-A1   ;  US6653008-B1   TOYOTA JIDOSHA KK (TOYT)   HIRAKATA S,  NISHIDA S,  AOTO A,  BISAKA T,  TANAKA H,  HOTTA Y