;  EP1624515-A1 -- US6080503-A   BALLARD POWER SYSTEMS INC (BLRD)   SCHMID O,  EINHART J;  US20030031914-A1   ;  US6596427-B1   BALLARD POWER SYSTEMS INC (BLRD)   WOZNICZKA B,  DEVAAL J,  TABATABAIAN M;  US2006073373-A1 -- US2913511-A   ;  US3138692-A   ;  US3432355-A   GENERAL ELECTRIC CO (GENE);  US3689334-A   ESB INC (ESBI);  US4175165-A   ENGELHARD MINERALS CORP (ENGH)   ADLHART O J;  US4324844-A   WESTINGHOUSE ELECTRIC CORP (WESE)   KOTHMANN R E;  US4673450-A   BOEING CO (BOEI)   BURKE J H;  US4861677-A   DU PONT DE NEMOURS & CO E I (DUPO)   LEE I H;  US5264299-A   INT FUEL CELLS CORP (ITFU)   KRASIJ M,  WATSON P R;  US5464700-A   BALLARD POWER SYSTEMS INC (BLRD)   STECK A E,  WEI J;  US5643999-A   DU PONT DE NEMOURS & CO E I (DUPO)   LEE I,  LIBERT T A;  US6057054-A   BALLARD POWER SYSTEMS INC (BLRD)   BARTON R H,  GIBB P R,  RONNE J A,  VOSS H H;  US6080503-A   BALLARD POWER SYSTEMS INC (BLRD)   SCHMID O,  EINHART J;  US6159628-A   INT FUEL CELLS LLC (ITFU)   KRASIJ M,  MOSKEY E A;  US20010001052-A1   ;  US20010055708-A1   ;  US20020064703-A1   ;  US20020068797-A1   ;  US20020110720-A1   ;  US20020187384-A1   ;  US20030124402-A1   ;  US20030180609-A1   ;  US20040096725-A1   ;  US6176953-B1   MOTOROLA INC (MOTI)   LANDRETH B D,  PRATT S D,  MUTHUSWAMY S,  KELLEY R J;  US6180274-B1   SANYO ELECTRIC CO LTD (SAOL)   YOSHIMOTO Y,  YASUO T,  MIYAKE Y,  NISHIO K;  US6261711-B1   PLUG POWER INC (PLUG-Non-standard)   MATLOCK R R,  BUESING D G;  US6280870-B1   PLUG POWER INC (PLUG-Non-standard)   EISMAN G A,  MAYNARD W B,  FARKASH R H,  CARLSTROM C M;  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;  US6348279-B1   NISSHINBO IND INC (NISN)   SAITO K,  HAGIWARA A,  TANNO F;  US6440597-B1   TOYOTA JIDOSHA KK (TOYT)   MIZUNO S;  US6545091-B1   DU PONT DE NEMOURS & CO E I (DUPO)   LEE I,  MORRIS B A;  EP1624515-B1 -- US6080503-A   BALLARD POWER SYSTEMS INC (BLRD)   SCHMID O,  EINHART J;  US20030031914-A1   ;  US6596427-B1   BALLARD POWER SYSTEMS INC (BLRD)   WOZNICZKA B,  DEVAAL J,  TABATABAIAN M;  US2011294033-A1 -- US20020187384-A1   ;  US20030090027-A1   ;  US20050147778-A1   ;  US6261711-B1   PLUG POWER INC (PLUG-Non-standard)   MATLOCK R R,  BUESING D G