US2004197627-A1 -- US3134697-A   ;  US3631073-A   ENGELHARD MINERALS & CHEM CORP (ENGH);  US4175165-A   ENGELHARD MINERALS CORP (ENGH)   ADLHART O J;  US4467050-A   ENERGY RES CORP (ENER-Non-standard)   PATEL P,  DHARIA D,  MARU H;  US5217821-A   INT FUEL CELLS CORP (ITFU)   LANDSMAN D A,  PLASSE P A;  US5272017-A   GENERAL MOTORS CORP (GENK)   SWATHIRAJAN S,  MIKHAIL Y M;  US5346780-A   TOSHIBA KK (TOKE)   SUZUKI N;  US5350643-A   HITACHI LTD (HITA)   IMAHASHI J,  HORIBA T,  MURANAKA T;  US5474857-A   MATSUSHITA ELEC IND CO LTD (MATU)   UCHIDA M,  AOYAMA Y,  EDA N,  OGAWA M;  US5482680-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  VOSS H H,  DUDLEY J,  LAMONT G J,  BASURA V;  US5561000-A   VITO VLAAMSE INSTELLING TECHNOLOGISCH (VITO-Non-standard)   DIRVEN P,  ENGELEN W;  US5702836-A   UNIV MASSACHUSETTS (UMAC)   KOWALAK A D,  MA C;  US5795669-A   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;  US5863673-A   BALLARD POWER SYSTEMS INC (BLRD)   CAMPBELL S A,  STUMPER J,  WILKINSON D P,  DAVIS M T;  US5874182-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  JOHNSON M C,  COLBOW K M,  CAMPBELL S A;  US20020150807-A1   ;  US6277513-B1   GENERAL MOTORS CORP (GENK)   SWATHIRAJAN S,  MIKHAIL Y M;  US6361896-B1   ZENT SONNENENERGIE & WASSERSTOFF-FORSCH (SONN-Non-standard)   EBERLE K,  ROHLAND B,  SCHOLTA J,  STROEBEL R;  WO2004091004-A2 -- US4175165-A   ENGELHARD MINERALS CORP (ENGH)   ADLHART O J;  US4467050-A   ENERGY RES CORP (ENER-Non-standard)   PATEL P,  DHARIA D,  MARU H;  US5702836-A   UNIV MASSACHUSETTS (UMAC)   KOWALAK A D,  MA C;  US5795669-A   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;  US7960072-B2 -- EP736921-B1   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;  GB1116585-A   ;  US3134697-A   ;  US3631073-A   ENGELHARD MINERALS & CHEM CORP (ENGH);  US4175165-A   ENGELHARD MINERALS CORP (ENGH)   ADLHART O J;  US4467050-A   ENERGY RES CORP (ENER-Non-standard)   PATEL P,  DHARIA D,  MARU H;  US5217821-A   INT FUEL CELLS CORP (ITFU)   LANDSMAN D A,  PLASSE P A;  US5272017-A   GENERAL MOTORS CORP (GENK)   SWATHIRAJAN S,  MIKHAIL Y M;  US5346780-A   TOSHIBA KK (TOKE)   SUZUKI N;  US5350643-A   HITACHI LTD (HITA)   IMAHASHI J,  HORIBA T,  MURANAKA T;  US5474857-A   MATSUSHITA ELEC IND CO LTD (MATU)   UCHIDA M,  AOYAMA Y,  EDA N,  OGAWA M;  US5482680-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  VOSS H H,  DUDLEY J,  LAMONT G J,  BASURA V;  US5561000-A   VITO VLAAMSE INSTELLING TECHNOLOGISCH (VITO-Non-standard)   DIRVEN P,  ENGELEN W;  US5702836-A   UNIV MASSACHUSETTS (UMAC)   KOWALAK A D,  MA C;  US5795669-A   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;  US5863673-A   BALLARD POWER SYSTEMS INC (BLRD)   CAMPBELL S A,  STUMPER J,  WILKINSON D P,  DAVIS M T;  US5874182-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  JOHNSON M C,  COLBOW K M,  CAMPBELL S A;  US6277513-B1   GENERAL MOTORS CORP (GENK)   SWATHIRAJAN S,  MIKHAIL Y M;  US6361896-B1   ZENT SONNENENERGIE & WASSERSTOFF-FORSCH (SONN-Non-standard)   EBERLE K,  ROHLAND B,  SCHOLTA J,  STROEBEL R;  WO1997040542-A1   ;  JP5030583-B2 -- JP09027326-A   ;  JP59027473-A   ENERGY RES CORP (ENER-Non-standard)   PATEL P,  DHARIA D,  MARU H;  JP2001076742-A   ;  JP2001149781-A   ;  JP2001338653-A   RIKEN CORP (RIKE)   KO K,  KUNIMOTO A;  JP2001502105-A   ZENT SONNENENERGIE & WASSERSTOFF-FORSCH (SONN-Non-standard)   EBERLE K,  ROHLAND B,  SCHOLTA J,  STROEBEL R;  JP2002306972-A   ;  JP2002358986-A   ASIA PACIFIC FUEL CELL TECHNOLOGIES LTD (ASPA-Non-standard)   YANG J Y;  JP09504901-W   ;  US5702836-A   UNIV MASSACHUSETTS (UMAC)   KOWALAK A D,  MA C;  WO2002039525-A1