;  US2004180781-A1 -- US4927799-A   TOYOTA JIDOSHA KK (TOYT);  TOYOTA CHUO KENKYUSHO KK (TOYW)   MATSUMOTO S,  MIYOSHI N,  KIMURA M,  OZAWA M,  ISOGAI A;  US4957896-A   TOYOTA JIDOSHA KK (TOYT);  TOYOTA CENT RES & DEV LAB (TOYW)   MATSUMOTO M,  SHINJOH H,  SATO M,  TANAKA T,  ISHIKAWA Y,  MATSUURA S;  US5015617-A   NIPPON SHOKUBAI KAGAKU KOGYO CO LTD (JAPC)   OHATA T,  TSUCHITANI K,  KITAGUCHI S;  US5075276-A   TOYOTA JIDOSHA KK (TOYT);  TOYOTA CENT RES & DEV LAB (TOYW)   OZAWA M,  KIMURA M,  ISOGAI A,  MATSUMOTO S A,  MIYOSHI N N;  US5137992-A   KUREHA KAGAKU KOGYO KK (KURE)   KAWAKAMI Y,  SHIIKI Z;  US5260249-A   NIPPON SHOKUBAI CO LTD (JAPC)   SHIRAISHI E,  BABA H,  TSUCHITANI K,  OHATA T;  US5318757-A   NGK INSULATORS LTD (NIGA)   ABE F,  SUZUKI J;  US5532198-A   RHONE POULENC CHIM (RHON)   CHOPIN T,  VILMIN G;  US5607892-A   RHONE POULENC CHIM (RHON)   CHOPIN T,  VILMIN G;  US5945369-A   TOYOTA CHUO KENKYUSHO KK (TOYW)   KIMURA M,  MATSUOKA Y,  SOBUKAWA H,  FUKUI M,  SUDA A,  KANDORI T,  UKYO Y;  US5948377-A   ENGELHARD CORP (ENGH)   SUNG S;  US5958827-A   TOYOTA JIDOSHA KK (TOYT)   SUDA A,  SOBUKAWA H,  SUZUKI T,  KANDORI T,  UKYO Y,  SUGIURA M,  KIMURA M,  HIRAYAMA H,  IKEDA Y;  US6150288-A   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  SOBUKAWA H;  US20030129100-A1   ;  US6171572-B1   ANAN KASEI CO LTD (ANAN-Non-standard)   AOZASA S;  US6180075-B1   DEGUSSA AG (DEGS)   LINDNER D,  MUSSMANN L,  VAN YPEREN R,  KREUZER T,  LOX E;  US6248688-B1   ENGELHARD CORP (ENGH)   WU J H Z,  SYED M K;  US6306794-B1   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  SOBUKAWA H;  US6335305-B1   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  MORIKAWA A,  SOBUKAWA H;  US6455182-B1   UTC FUEL CELLS LLC (UNAC)   SILVER R G;  US6555088-B1   DMC2 DEGUSSA METALS CATALYSTS CERDEC AG (DEGS)   BAUMANN F,  WIELAND S;  US6576207-B1   DEGUSSA AG (DEGS)   MUSSMANN L,  VAN YPEREN R,  LINDNER D,  KREUZER T,  LOX E;  US6806225-B1   TOYOTA JIDOSHA KK (TOYT)   IKEDA Y,  HIRAYAMA H,  TANIZAWA R,  TSUJI S;  US6852665-B2   TOYOTA CHUO KENKYUSHO KK (TOYW)   MORIKAWA A,  HATANAKA M,  IMAGAWA H,  SUDA A,  TAKAHASHI N;  US7265076-B2 -- EP1046612-A1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   TAGUCHI K,  TOMIZAWA T,  UKAI K,  SHONO T,  KITAGAWA K;  EP1136441-A2   DMC2 DEGUSSA METALS CATALYSTS CERDEC AG (DEGS)   BAUMANN F,  WIELAND S;  JP05253484-A   ;  JP08155302-A   ;  JP10151348-A   TOYOTA CHUO KENKYUSHO KK (TOYW);  NIPPONDENSO CO LTD (NPDE)   YOKOTA K,  MATSUOKA Y,  SUDA A,  NAKAMURA K;  JP2000271480-A   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  MORIKAWA A,  SOBUKAWA H;  JP2000302410-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   TAGUCHI K,  TOMIZAWA T,  UKAI K,  SHONO T,  KITAGAWA K;  JP2001079391-A   ;  JP2001316682-A   DMC2 DEGUSSA METALS CATALYSTS CERDEC AG (DEGS)   BAUMANN F,  WIELAND S;  JP2001322803-A   DMC2 DEGUSSA METALS CATALYSTS CERDEC AG (DEGS)   BAUMANN F,  WIELAND S;  JP2002095966-A   ;  JP2002128507-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   UKAI K,  TAGUCHI K,  TOMIZAWA T,  FUJIWARA S;  JP2002273227-A   ;  JP2003200048-A   MATSUSHITA ELECTRIC WORKS LTD (MATW)   IGARASHI A,  HIGASHI H,  MIZOBUCHI M,  HASHIMOTO N,  KINUGAWA K;  US4927799-A   TOYOTA JIDOSHA KK (TOYT);  TOYOTA CHUO KENKYUSHO KK (TOYW)   MATSUMOTO S,  MIYOSHI N,  KIMURA M,  OZAWA M,  ISOGAI A;  US4957896-A   TOYOTA JIDOSHA KK (TOYT);  TOYOTA CENT RES & DEV LAB (TOYW)   MATSUMOTO M,  SHINJOH H,  SATO M,  TANAKA T,  ISHIKAWA Y,  MATSUURA S;  US5015617-A   NIPPON SHOKUBAI KAGAKU KOGYO CO LTD (JAPC)   OHATA T,  TSUCHITANI K,  KITAGUCHI S;  US5075276-A   TOYOTA JIDOSHA KK (TOYT);  TOYOTA CENT RES & DEV LAB (TOYW)   OZAWA M,  KIMURA M,  ISOGAI A,  MATSUMOTO S A,  MIYOSHI N N;  US5137992-A   KUREHA KAGAKU KOGYO KK (KURE)   KAWAKAMI Y,  SHIIKI Z;  US5260249-A   NIPPON SHOKUBAI CO LTD (JAPC)   SHIRAISHI E,  BABA H,  TSUCHITANI K,  OHATA T;  US5318757-A   NGK INSULATORS LTD (NIGA)   ABE F,  SUZUKI J;  US5532198-A   RHONE POULENC CHIM (RHON)   CHOPIN T,  VILMIN G;  US5607892-A   RHONE POULENC CHIM (RHON)   CHOPIN T,  VILMIN G;  US5945369-A   TOYOTA CHUO KENKYUSHO KK (TOYW)   KIMURA M,  MATSUOKA Y,  SOBUKAWA H,  FUKUI M,  SUDA A,  KANDORI T,  UKYO Y;  US5948377-A   ENGELHARD CORP (ENGH)   SUNG S;  US5958827-A   TOYOTA JIDOSHA KK (TOYT)   SUDA A,  SOBUKAWA H,  SUZUKI T,  KANDORI T,  UKYO Y,  SUGIURA M,  KIMURA M,  HIRAYAMA H,  IKEDA Y;  US6150288-A   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  SOBUKAWA H;  US20030129100-A1   ;  US6171572-B1   ANAN KASEI CO LTD (ANAN-Non-standard)   AOZASA S;  US6180075-B1   DEGUSSA AG (DEGS)   LINDNER D,  MUSSMANN L,  VAN YPEREN R,  KREUZER T,  LOX E;  US6248688-B1   ENGELHARD CORP (ENGH)   WU J H Z,  SYED M K;  US6306794-B1   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  SOBUKAWA H;  US6335305-B1   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  MORIKAWA A,  SOBUKAWA H;  US6455182-B1   UTC FUEL CELLS LLC (UNAC)   SILVER R G;  US6555088-B1   DMC2 DEGUSSA METALS CATALYSTS CERDEC AG (DEGS)   BAUMANN F,  WIELAND S;  US6576207-B1   DEGUSSA AG (DEGS)   MUSSMANN L,  VAN YPEREN R,  LINDNER D,  KREUZER T,  LOX E;  US6806225-B1   TOYOTA JIDOSHA KK (TOYT)   IKEDA Y,  HIRAYAMA H,  TANIZAWA R,  TSUJI S;  US6852665-B2   TOYOTA CHUO KENKYUSHO KK (TOYW)   MORIKAWA A,  HATANAKA M,  IMAGAWA H,  SUDA A,  TAKAHASHI N;  WO2000048261-A1   ;  JP4759221-B2 -- JP2000302410-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   TAGUCHI K,  TOMIZAWA T,  UKAI K,  SHONO T,  KITAGAWA K;  JP2002160922-A   ;  JP2002220228-A   TOYOTA CHUO KENKYUSHO KK (TOYW)   HATANAKA Y,  SUDA A,  SOFUGAWA H,  SUZUKI T;  JP2003117393-A   TOYOTA JIDOSHA KK (TOYT)   KANAZAWA T;  JP2003144925-A   SUED CHEM CATALYSTS JAPAN INC (SCHC-Non-standard)   TESHIGAWARA S,  MATSUHISA T,  ITAMI H;  JP2003277018-A   ;  JP2003320254-A   ;  JP2004141801-A