US2003190517-A1 -- US5350643-A   HITACHI LTD (HITA)   IMAHASHI J,  HORIBA T,  MURANAKA T;  US5470671-A   BALLARD POWER SYSTEMS INC (BLRD)   FLETCHER N J,  LAMONT G J,  BASURA V,  VOSS H H,  WILKINSON D P;  US5486430-A   BALLARD POWER SYSTEMS INC (BLRD)   CHOW C Y,  GORBELL B N,  WOZNICZKA B M;  US5500292-A   HITACHI LTD (HITA)   MURANAKA Y,  IMAHASHI J,  HORIBA T,  NISHIMURA S;  US5871860-A   JOHNSON MATTHEY PLC (JOHO)   FROST J C,  GASCOYNE J M,  HARDS G A;  US5976726-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  STUMPER J,  CAMPBELL S A,  DAVIS M T,  LAMONT G J;  US6066409-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;  US20010052389-A1   ;  US20020037449-A1   ;  US20040185325-A1   ;  US6232006-B1   INT FUEL CELLS LLC (ITFU)   BREAULT R D;  US6309772-B1   DEGUSSA-HUELS AG (DEGS)   ZUBER R,  FEHL K,  STARZ K,  STENKE U;  US6335112-B1   AISIN SEIKI KK (AISE)   AKAKABE M,  SHA T;  US6350538-B1   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  CAMPBELL S A,  STUMPER J;  US6365293-B1   SANYO ELECTRIC CO LTD (SAOL)   ISONO T,  MIYAKE Y,  HAMADA A,  KANEKO M,  NAKATO K;  US6403247-B1   INT FUEL CELLS LLC (ITFU)   GUTHRIE R J,  CORRIGAN T J,  BONK S P;  US6420059-B1   CALIFORNIA INST OF TECHNOLOGY (CALY)   SURAMPUDI S,  FRANK H A,  NARAYANAN S R,  CHUN W,  JEFFRIES-NAKAMURA B,  KINDLER A,  HALPERT G;  US6475651-B1   BALLARD POWER SYSTEMS INC (BLRD)   CAMPBELL S A,  WILKINSON D P;  US6737183-B1   DE NORA FUEL CELLS SPA (ORON)   MAZZUCCHELLI G,  BRAMBILLA M,  FLEBA G P,  MAGGIORE A;  WO2003088388-A1 -- US5500292-A   HITACHI LTD (HITA)   MURANAKA Y,  IMAHASHI J,  HORIBA T,  NISHIMURA S;  US6309772-B1   DEGUSSA-HUELS AG (DEGS)   ZUBER R,  FEHL K,  STARZ K,  STENKE U;  US6365293-B1   SANYO ELECTRIC CO LTD (SAOL)   ISONO T,  MIYAKE Y,  HAMADA A,  KANEKO M,  NAKATO K;  EP1495503-A1 -- EP736921-A1   JOHNSON MATTHEY PLC (JOHO);  BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  VOSS H H,  PRATER K B,  HARDS G A,  RALPH T R,  THOMPSETT D;  US5350643-A   HITACHI LTD (HITA)   IMAHASHI J,  HORIBA T,  MURANAKA T;  US20020037449-A1   ;  US6335112-B1   AISIN SEIKI KK (AISE)   AKAKABE M,  SHA T;  WO2001022514-A1   ;  WO2001093999-A2