WO2004006374-A1 -- DE19902219-C1   ;  EP476610-A   ISHIKAWAJIMA HARIMA JUKOGYO KK (ISHI);  TOKYO GAS CO LTD (TOLG);  OSAKA GAS CO LTD (OSAG);  TOHO GAS KK (TOHG)   MORIMOTO H,  HATO,  HATORI S,  KOBAYASHI K,  UEMATSU H,  HIKITA T,  SHINOZAKI K,  NAKAGAWA S;  EP476610-A3   ISHIKAWAJIMA HARIMA JUKOGYO KK (ISHI);  TOKYO GAS CO LTD (TOLG);  OSAKA GAS CO LTD (OSAG);  TOHO GAS KK (TOHG)   MORIMOTO H,  HATO,  HATORI S,  KOBAYASHI K,  UEMATSU H,  HIKITA T,  SHINOZAKI K,  NAKAGAWA S;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US6316134-B1   BALLARD GENERATION SYSTEMS INC (BALL-Non-standard)   COWNDEN R,  EICHE M,  LOUIE C R,  WATKINS D S;  WO2002054521-A1   ;  WO2001003212-A2   ;  WO2002022234-A2   ;  DE10230283-A1 -- DE10107712-A1   VIT R (VITR-Individual);  DOHAENYOS M (DOHA-Individual);  ZAEBRANSKAE J (ZAEB-Individual);  KUTIL J (KUTI-Individual)   VIT R,  DOHAENYOS M,  ZAEBRANSKAE J,  KUTIL J;  DE10110169-A1   DENSO CORP (NPDE)   OSHIMA H,  HIRAMATSU H;  DE19962947-A1   XCELLSIS GMBH (XCEL-Non-standard);  BASF AG (BADI)   BONEBERG S,  KARL M,  ROESER T,  SCHUESSLER M,  ZUR MEGEDE D,  HARTH K,  HOELZLE M,  SPRAGUE M;  JP60054177-A   ;  US5885727-A   TOYOTA JIDOSHA KK (TOYT)   KAWATSU S;  US2006096456-A1 -- US4898601-A   CASEY M E (CASE-Individual)   CASEY M E;  US5595949-A   EFL ELECTRIC FUEL LTD (EFLE-Non-standard)   GOLDSTEIN J,  HARATS Y,  SHARON Y,  NAIMER N;  US5885727-A   TOYOTA JIDOSHA KK (TOYT)   KAWATSU S;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US20010028965-A1   ;  US6316134-B1   BALLARD GENERATION SYSTEMS INC (BALL-Non-standard)   COWNDEN R,  EICHE M,  LOUIE C R,  WATKINS D S;  US6432177-B1   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  US6444016-B2   DENSO CORP (NPDE)   OSHIMA H,  HIRAMATSU H;  US6689194-B2   PRATT S D (PRAT-Individual);  MUTHUSWAMY S (MUTH-Individual);  KELLEY R J (KELL-Individual);  PENNISI R W (PENN-Individual)   PRATT S D,  MUTHUSWAMY S,  KELLEY R J,  PENNISI R W;  US6797027-B2   DONALDSON CO INC (DOND)   STENERSEN E,  NYMAN W M,  CANEPA R T;  US7449046-B2 -- DE4412450-A1   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  DE10107712-A1   VIT R (VITR-Individual);  DOHAENYOS M (DOHA-Individual);  ZAEBRANSKAE J (ZAEB-Individual);  KUTIL J (KUTI-Individual)   VIT R,  DOHAENYOS M,  ZAEBRANSKAE J,  KUTIL J;  DE10110169-A1   DENSO CORP (NPDE)   OSHIMA H,  HIRAMATSU H;  DE19962947-A1   XCELLSIS GMBH (XCEL-Non-standard);  BASF AG (BADI)   BONEBERG S,  KARL M,  ROESER T,  SCHUESSLER M,  ZUR MEGEDE D,  HARTH K,  HOELZLE M,  SPRAGUE M;  DE19902219-C1   ;  EP476610-A   ISHIKAWAJIMA HARIMA JUKOGYO KK (ISHI);  TOKYO GAS CO LTD (TOLG);  OSAKA GAS CO LTD (OSAG);  TOHO GAS KK (TOHG)   MORIMOTO H,  HATO,  HATORI S,  KOBAYASHI K,  UEMATSU H,  HIKITA T,  SHINOZAKI K,  NAKAGAWA S;  JP60054177-A   ;  US4898601-A   CASEY M E (CASE-Individual)   CASEY M E;  US5595949-A   EFL ELECTRIC FUEL LTD (EFLE-Non-standard)   GOLDSTEIN J,  HARATS Y,  SHARON Y,  NAIMER N;  US5885727-A   TOYOTA JIDOSHA KK (TOYT)   KAWATSU S;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US20010028965-A1   ;  US6316134-B1   BALLARD GENERATION SYSTEMS INC (BALL-Non-standard)   COWNDEN R,  EICHE M,  LOUIE C R,  WATKINS D S;  US6432177-B1   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  US6444016-B2   DENSO CORP (NPDE)   OSHIMA H,  HIRAMATSU H;  US6689194-B2   PRATT S D (PRAT-Individual);  MUTHUSWAMY S (MUTH-Individual);  KELLEY R J (KELL-Individual);  PENNISI R W (PENN-Individual)   PRATT S D,  MUTHUSWAMY S,  KELLEY R J,  PENNISI R W;  US6797027-B2   DONALDSON CO INC (DOND)   STENERSEN E,  NYMAN W M,  CANEPA R T;  WO2002054521-A1   ;  WO2001003212-A2   ;  WO2002022234-A2