US2001053470-A1 -- US4120787-A   UNITED TECHNOLOGIES CORP (UNAC)   YARGEAU B A;  US4973529-A   INT FUEL CELLS SOUT (LTFU-Non-standard)   GRASSO A P,  VOGEL W M,  TAYLOR A,  DUFNER B F;  US6146781-A   CALIFORNIA INST OF TECHNOLOGY (CALY)   SURAMPUDI S,  FRANK H A,  NARAYANAN S R,  CHUN W,  JEFFRIES-NAKAMURA B,  KINDLER A,  HALPERT G;  US6171718-B1   INT FUEL CELLS LLC (ITFU)   MURACH B L,  VAN DINE L L;  US6376113-B1   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US6511765-B2   EQUOS RES KK (EQUS)   MASATAKA U,  KENJI K,  MUNEHISA H,  NORIYUKI T;  EP1168476-A2 -- EP1056148-A2   MATSUSHITA ELECTRIC IND CO LTD (MATU)   YAMAMOTO Y,  OZEKI M,  NAKAMURA A;  EP1056148-B1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   YAMAMOTO Y,  OZEKI M,  NAKAMURA A;  US5268240-A   FUJI ELECTRIC CO LTD (FJIE)   MIYAMA H;  US5335628-A   AQUA CHEM INC (AQAC)   DUNBAR W R;  US5985474-A   PLUG POWER LLC (PLUG-Non-standard)   CHEN J S,  HUANG W,  ACKER W P;  US6787255-B2 -- US4120787-A   UNITED TECHNOLOGIES CORP (UNAC)   YARGEAU B A;  US4973529-A   INT FUEL CELLS SOUT (LTFU-Non-standard)   GRASSO A P,  VOGEL W M,  TAYLOR A,  DUFNER B F;  US6146781-A   CALIFORNIA INST OF TECHNOLOGY (CALY)   SURAMPUDI S,  FRANK H A,  NARAYANAN S R,  CHUN W,  JEFFRIES-NAKAMURA B,  KINDLER A,  HALPERT G;  US6171718-B1   INT FUEL CELLS LLC (ITFU)   MURACH B L,  VAN DINE L L;  US6376113-B1   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US6511765-B2   EQUOS RES KK (EQUS)   MASATAKA U,  KENJI K,  MUNEHISA H,  NORIYUKI T;  EP1968145-A1 -- EP1056148-A2   MATSUSHITA ELECTRIC IND CO LTD (MATU)   YAMAMOTO Y,  OZEKI M,  NAKAMURA A;  JP2000185355-A   ;  JP2000185356-A   ;  US5268240-A   FUJI ELECTRIC CO LTD (FJIE)   MIYAMA H;  US5335628-A   AQUA CHEM INC (AQAC)   DUNBAR W R;  US5985474-A   PLUG POWER LLC (PLUG-Non-standard)   CHEN J S,  HUANG W,  ACKER W P;  EP1168476-B1 -- EP1056148-A2   MATSUSHITA ELECTRIC IND CO LTD (MATU)   YAMAMOTO Y,  OZEKI M,  NAKAMURA A;  US5268240-A   FUJI ELECTRIC CO LTD (FJIE)   MIYAMA H;  US5335628-A   AQUA CHEM INC (AQAC)   DUNBAR W R;  US5985474-A   PLUG POWER LLC (PLUG-Non-standard)   CHEN J S,  HUANG W,  ACKER W P;  JP4660888-B2 -- JP06140066-A   ;  JP08250142-A   ;  JP10223245-A   ;  JP11233130-A   ;  JP2000012055-A   ;  JP2000090948-A   ;  JP2001255010-A