US2004121205-A1 -- US1967781-A   ;  US3101930-A   ;  US4225654-A   FUJI ELECTRIC CO LTD (FJIE)   TAJIMA H,  ARAI T;  US4719157-A   SANYO ELECTRIC CO (SAOL);  SANYO MOTOR KK (SANY-Non-standard)   HAGINO H,  FUJIWARA O,  GOTO K;  US5009968-A   INT FUEL CELLS CORP (ITFU)   GUTHRIE R J,  KATZ M,  SCHROLL C R;  US5324565-A   UNITED TECHNOLOGIES CORP (UNAC)   LEONIDA A,  MOULTHROP L C;  US5856034-A   MTU FRIEDRICHSHAFEN GMBH (MOTU)   HUPPMANN G,  KRAUS P;  US6106964-A   BALLARD POWER SYSTEMS INC (BLRD)   WELLS B W,  BARTON R H,  RONNE J A,  VOSS H H,  NIGSCH H A;  US6110612-A   PLUG POWER INC (PLUG-Non-standard)   WALSH M M;  US6318066-B1   ALLIED-SIGNAL INC (ALLC)   SKOWRONSKI M J;  WO2004061998-A2 -- JP01048381-A   ;  JP09293528-A   ;  US4225654-A   FUJI ELECTRIC CO LTD (FJIE)   TAJIMA H,  ARAI T;  US4719157-A   SANYO ELECTRIC CO (SAOL);  SANYO MOTOR KK (SANY-Non-standard)   HAGINO H,  FUJIWARA O,  GOTO K;  US5324565-A   UNITED TECHNOLOGIES CORP (UNAC)   LEONIDA A,  MOULTHROP L C;  US6106964-A   BALLARD POWER SYSTEMS INC (BLRD)   WELLS B W,  BARTON R H,  RONNE J A,  VOSS H H,  NIGSCH H A;  US6110612-A   PLUG POWER INC (PLUG-Non-standard)   WALSH M M;  US6318066-B1   ALLIED-SIGNAL INC (ALLC)   SKOWRONSKI M J;  EP1590844-A2 -- DE19505913-C1   ;  EP450336-A   MITSUBISHI JUKOGYO KK (MITO)   IRINO M,  ISHIBASHI M,  SATAKE T,  SAKAI H,  FUNATSU M,  HANEDA H,  TAKENOBU K,  WATANABE K,  OGURA K;  JP07006782-A   ;  JP59075573-A   ;  JP63051058-A   ;  JP2002313407-A   ;  US7070874-B2 -- JP01048381-A   ;  JP01089154-A   ;  JP04121969-A   ;  JP07006782-A   ;  JP09293528-A   ;  JP60105177-A   ;  US1967781-A   ;  US3101930-A   ;  US4225654-A   FUJI ELECTRIC CO LTD (FJIE)   TAJIMA H,  ARAI T;  US4719157-A   SANYO ELECTRIC CO (SAOL);  SANYO MOTOR KK (SANY-Non-standard)   HAGINO H,  FUJIWARA O,  GOTO K;  US5324565-A   UNITED TECHNOLOGIES CORP (UNAC)   LEONIDA A,  MOULTHROP L C;  US6106964-A   BALLARD POWER SYSTEMS INC (BLRD)   WELLS B W,  BARTON R H,  RONNE J A,  VOSS H H,  NIGSCH H A;  US6110612-A   PLUG POWER INC (PLUG-Non-standard)   WALSH M M;  US6318066-B1   ALLIED-SIGNAL INC (ALLC)   SKOWRONSKI M J;  US5009968-A   INT FUEL CELLS CORP (ITFU)   GUTHRIE R J,  KATZ M,  SCHROLL C R;  US5856034-A   MTU FRIEDRICHSHAFEN GMBH (MOTU)   HUPPMANN G,  KRAUS P;  JP4669917-B2 -- JP04123767-A   ;  JP04328265-A   ;  JP06150950-A   ;  JP07320758-A   ;  JP60020473-A   ;  JP62184777-A   SANYO ELECTRIC CO (SAOL);  SANYO MOTOR KK (SANY-Non-standard)   HAGINO H,  FUJIWARA O,  GOTO K;  JP2000223138-A   ;  JP2002302785-A   MITSUBISHI JUKOGYO KK (MITO)   SHIMIZU K,  KUDOME O,  HASHIZAKI K,  HASHIMOTO A,  HANDA H,  INOUE K;  WO2004061998-A3 -- JP09293528-A   ;  JP64048381-A   ;  US1967781-A   ;  US3101930-A   ;  US4225654-A   FUJI ELECTRIC CO LTD (FJIE)   TAJIMA H,  ARAI T;  US4719157-A   SANYO ELECTRIC CO (SAOL);  SANYO MOTOR KK (SANY-Non-standard)   HAGINO H,  FUJIWARA O,  GOTO K;  US5324565-A   UNITED TECHNOLOGIES CORP (UNAC)   LEONIDA A,  MOULTHROP L C;  US6106964-A   BALLARD POWER SYSTEMS INC (BLRD)   WELLS B W,  BARTON R H,  RONNE J A,  VOSS H H,  NIGSCH H A;  US6110612-A   PLUG POWER INC (PLUG-Non-standard)   WALSH M M;  US6318066-B1   ALLIED-SIGNAL INC (ALLC)   SKOWRONSKI M J;  EP1590844-B1 -- DE19505913-C1   ;  EP450336-A   MITSUBISHI JUKOGYO KK (MITO)   IRINO M,  ISHIBASHI M,  SATAKE T,  SAKAI H,  FUNATSU M,  HANEDA H,  TAKENOBU K,  WATANABE K,  OGURA K;  JP10048381-A   ;  JP59075573-A   ;  JP63051058-A   ;  JP70006782-A   ;  JP92093528-A   ;  JP2002313407-A   ;  US1967781-A   ;  US3101930-A   ;  US4225654-A   FUJI ELECTRIC CO LTD (FJIE)   TAJIMA H,  ARAI T;  US4719157-A   SANYO ELECTRIC CO (SAOL);  SANYO MOTOR KK (SANY-Non-standard)   HAGINO H,  FUJIWARA O,  GOTO K;  US5324565-A   UNITED TECHNOLOGIES CORP (UNAC)   LEONIDA A,  MOULTHROP L C;  US6106964-A   BALLARD POWER SYSTEMS INC (BLRD)   WELLS B W,  BARTON R H,  RONNE J A,  VOSS H H,  NIGSCH H A;  US6110612-A   PLUG POWER INC (PLUG-Non-standard)   WALSH M M;  US6318066-B1   ALLIED-SIGNAL INC (ALLC)   SKOWRONSKI M J