;  US2002127452-A1 -- US3553023-A   UNITED AIRCRAFT CORP (UNAC);  US4459342-A   KUREHA KAGAKU KOGYO KK (KURE)   SHIGETA M,  SAITOH K,  FUKUDA H;  US4615955-A   HITACHI LTD (HITA)   AMAGAWA H,  UOZUMI S;  US4804592-A   US DEPT ENERGY (USAT);  US GOVERNMENT (USGO)   VANDERBORG N E,  HUFF J R,  LEDDY J;  US4851377-A   INT FUEL CELLS CORP (ITFU)   BREAULT R D;  US4855193-A   UNITED TECHNOLOGIES CORP (UNAC)   MCELROY J F;  US5252410-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  VOSS H H,  PRATER K B;  US5260143-A   BALLARD POWER SYSTEMS INC (BLRD)   VOSS H H,  WILKINSON D P,  WATKINS D S;  US2003082432-A1 -- US3553023-A   UNITED AIRCRAFT CORP (UNAC);  US4459342-A   KUREHA KAGAKU KOGYO KK (KURE)   SHIGETA M,  SAITOH K,  FUKUDA H;  US4615955-A   HITACHI LTD (HITA)   AMAGAWA H,  UOZUMI S;  US4804592-A   US DEPT ENERGY (USAT);  US GOVERNMENT (USGO)   VANDERBORG N E,  HUFF J R,  LEDDY J;  US4851377-A   INT FUEL CELLS CORP (ITFU)   BREAULT R D;  US4855193-A   UNITED TECHNOLOGIES CORP (UNAC)   MCELROY J F;  US5252410-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  VOSS H H,  PRATER K B;  US5260143-A   BALLARD POWER SYSTEMS INC (BLRD)   VOSS H H,  WILKINSON D P,  WATKINS D S;  US5300370-A   BALLARD POWER SYSTEMS INC (BLRD)   VOSS H H,  WILKINSON D P,  WASHINGTON K B;  US5558948-A   ENERGY RES CORP (ENER-Non-standard)   DOYON J D;  US5677073-A   TOYOTA JIDOSHA KK (TOYT)   KAWATSU S;  US5702839-A   JOHNSON MATTHEY PLC (JOHO)   FROST J C,  GASCOYNE J M,  HARDS G A;  US5840438-A   BALLARD POWER SYSTEMS INC (BLRD)   JOHNSON M C,  WILKINSON D P,  ASMAN C P,  BOS M L,  POTTER R J;  US5958613-A   SANYO ELECTRIC CO LTD (SAOL)   HAMADA A,  MATSUBAYASHI T,  NAKAOKA T,  MIYAKE Y,  NAKAJIMA T;  US6054025-A   MITSUBISHI DENKI KK (MITQ);  US6924057-B2 -- WO1997008766-A2   ;  EP654837-A1   JOHNSON MATTHEY PLC (JOHO)   FROST J C,  GASCOYNE J M,  HARDS G A;  EP343679-B1   INT FUEL CELLS CORP (ITFU)   REISER C A;  GB133882-A   ;  GB2316802-A   UNIV NEW YORK STATE RES FOUND (UYNY)   CABASSO I,  YUAN Y,  XU X;  JP03222261-A   ;  JP04095357-A   ;  JP10092439-A   UNIV NEW YORK STATE RES FOUND (UYNY)   CABASSO I,  YUAN Y,  XU X;  US3553023-A   UNITED AIRCRAFT CORP (UNAC);  US4459342-A   KUREHA KAGAKU KOGYO KK (KURE)   SHIGETA M,  SAITOH K,  FUKUDA H;  US4615955-A   HITACHI LTD (HITA)   AMAGAWA H,  UOZUMI S;  US4804592-A   US DEPT ENERGY (USAT);  US GOVERNMENT (USGO)   VANDERBORG N E,  HUFF J R,  LEDDY J;  US4851377-A   INT FUEL CELLS CORP (ITFU)   BREAULT R D;  US4855193-A   UNITED TECHNOLOGIES CORP (UNAC)   MCELROY J F;  US5252410-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  VOSS H H,  PRATER K B;  US5260143-A   BALLARD POWER SYSTEMS INC (BLRD)   VOSS H H,  WILKINSON D P,  WATKINS D S;  US5300370-A   BALLARD POWER SYSTEMS INC (BLRD)   VOSS H H,  WILKINSON D P,  WASHINGTON K B;  US5558948-A   ENERGY RES CORP (ENER-Non-standard)   DOYON J D;  US5677073-A   TOYOTA JIDOSHA KK (TOYT)   KAWATSU S;  US5702839-A   JOHNSON MATTHEY PLC (JOHO)   FROST J C,  GASCOYNE J M,  HARDS G A;  US5840438-A   BALLARD POWER SYSTEMS INC (BLRD)   JOHNSON M C,  WILKINSON D P,  ASMAN C P,  BOS M L,  POTTER R J;  US5958613-A   SANYO ELECTRIC CO LTD (SAOL)   HAMADA A,  MATSUBAYASHI T,  NAKAOKA T,  MIYAKE Y,  NAKAJIMA T;  US6054025-A   MITSUBISHI DENKI KK (MITQ);  WO1994005049-A1   ;  WO1994011912-A1   ;  WO1995008851-A1   ;  WO1995022179-A1