US2002055028-A1 -- US3468712-A   ;  US3484298-A   ;  US3530005-A   ALLIS-CHALMERS MFG CO (ALCM);  US4767518-A   WESTINGHOUSE ELECTRIC CORP (WESE)   MASKALICK N J;  US4997170-A   OPEL AG ADAM (OPEL);  GENERAL MOTORS CORP (GENK)   ROOS J,  KONRAD W;  US5035962-A   WESTINGHOUSE ELECTRIC CORP (WESE)   JENSEN R R;  US5037525-A   COMMONWEALTH SCI & IND RES ORG (CSIR);  BADWAL S P S (BADW-Individual)   BADWAL S P S;  US5300370-A   BALLARD POWER SYSTEMS INC (BLRD)   VOSS H H,  WILKINSON D P,  WASHINGTON K B;  US5316644-A   UNITED TECHNOLOGIES CORP (UNAC)   TITTERINGTON W A,  LEONIDA A;  US5385792-A   MURATA MFG CO LTD (MURA)   SHIRATORI A,  TAKAGI H,  KOBAYASHI S;  US5527363-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  LAMONT G J,  VOSS H H,  SCHWAB C;  US5629103-A   SIEMENS AG (SIEI)   WERSING W,  IVERS-TIFFEE E,  LANDES H,  MAENNER R,  NOELSCHER C,  SCHMIDT H,  SCHNOELLER M;  US5676806-A   STICHTING ENERGIE (ENER-Non-standard)   VAN BERKEL F P F,  DE JONG J P,  HUIJSMANS J P P;  US5683828-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  US5770327-A   UNIV NORTHWESTERN (NOUN)   TSAI T,  BARNETT S A;  US5776624-A   GENERAL MOTORS CORP (GENK)   NEUTZLER J K;  US5858567-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  US5858569-A   PLUG POWER LLC (PLUG-Non-standard)   VITALE N G,  MEACHER J;  US5863671-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  US20020024185-A1   ;  WO200239528-A2 -- EP1220347-A2   MATSUSHITA ELECTRIC IND CO LTD (MATU)   YAMAZAKI T,  YAMAMOTO Y,  KUSAKABE H,  OHARA H,  HASE N,  TAKEGUCHI S;  US3484298-A   ;  WO2002017416-A2   ;  US6855451-B2 -- US20020024185-A1   ;  EP1220347-A2   MATSUSHITA ELECTRIC IND CO LTD (MATU)   YAMAZAKI T,  YAMAMOTO Y,  KUSAKABE H,  OHARA H,  HASE N,  TAKEGUCHI S;  US3468712-A   ;  US3484298-A   ;  US3530005-A   ALLIS-CHALMERS MFG CO (ALCM);  US4597170-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O;  US4767518-A   WESTINGHOUSE ELECTRIC CORP (WESE)   MASKALICK N J;  US5035962-A   WESTINGHOUSE ELECTRIC CORP (WESE)   JENSEN R R;  US5037525-A   COMMONWEALTH SCI & IND RES ORG (CSIR);  BADWAL S P S (BADW-Individual)   BADWAL S P S;  US5300370-A   BALLARD POWER SYSTEMS INC (BLRD)   VOSS H H,  WILKINSON D P,  WASHINGTON K B;  US5316644-A   UNITED TECHNOLOGIES CORP (UNAC)   TITTERINGTON W A,  LEONIDA A;  US5385792-A   MURATA MFG CO LTD (MURA)   SHIRATORI A,  TAKAGI H,  KOBAYASHI S;  US5527363-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  LAMONT G J,  VOSS H H,  SCHWAB C;  US5629103-A   SIEMENS AG (SIEI)   WERSING W,  IVERS-TIFFEE E,  LANDES H,  MAENNER R,  NOELSCHER C,  SCHMIDT H,  SCHNOELLER M;  US5676806-A   STICHTING ENERGIE (ENER-Non-standard)   VAN BERKEL F P F,  DE JONG J P,  HUIJSMANS J P P;  US5683828-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  US5770327-A   UNIV NORTHWESTERN (NOUN)   TSAI T,  BARNETT S A;  US5776624-A   GENERAL MOTORS CORP (GENK)   NEUTZLER J K;  US5858567-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  US5858569-A   PLUG POWER LLC (PLUG-Non-standard)   VITALE N G,  MEACHER J;  US5863671-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  WO1996034421-A1   ;  WO1998024136-A1   ;  WO2002017416-A2