US2003186805-A1 -- US3565830-A   ENGELHARD MINERALS & CHEM CORP (ENGH);  US3825501-A   TEXACO INC (TEXC);  US3870455-A   ENGELHARD MINERALS CORP (ENGH)   HINDIN S G;  US4021366-A   TEXACO INC (TEXC)   ROBIN A M,  CHILD E T;  US4157316-A   ENGELHARD MINERALS CORP (ENGH)   THOMPSON C E,  MOONEY J J,  KEITH C D;  US4170573-A   GRACE & CO W R (GRAC)   ERNEST M V,  MASELLI J M;  US4171288-A   ENGELHARD MINERALS CORP (ENGH);  US4297246-A   UK ATOMIC ENERGY AUTHORITY (UKAT);  US4308176-A   NORSK HYDRO AS (NHYD)   KRISTIANSE L A;  US4331565-A   GENERAL MOTORS CORP (GENK)   SCHAEFER C F,  BEDFORD R E;  US4476246-A   GRACE & CO W R (GRAC)   KIM G,  ERNEST M V;  US4585752-A   GRACE & CO W R (GRAC)   ERNEST M V;  US5057483-A   ENGELHARD CORP (ENGH)   WAN C Z;  US5073532-A   DEGUSSA AG (DEGS)   DOMESLE R,  ENGLER B,  KOBERSTEIN E,  SCHUBERT P;  US5254519-A   ENGELHARD CORP (ENGH)   WAN C,  TAUSTER S J,  RABINOWITZ H N;  US5464606-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  BUSWELL R F,  CLAUSI J V;  US5480854-A   JOHNSON MATTHEY PLC (JOHO)   RAJARAM R R,  HAYES J W,  ANSELL G P,  HATCHER H A;  US5491120-A   ENGELHARD CORP (ENGH)   VOSS K E,  YAVUZ B O,  FARRAUTO R J,  GALLIGAN M P;  US5492878-A   MITSUI MINING & SMELTING CO (MITG)   FUJII,  SUZUKI K,  KIMURA K;  US5516597-A   WESTINGHOUSE ELECTRIC CORP (WESE)   RICHARDS V L,  VASILOW T R,  SINGH P;  US5744118-A   SHOWA DENKO KK (SHOW)   SMITH D M,  YAMAGUCHI T,  IZAWA H,  IMAMURA K,  DIGREGORIO J F;  US5788950-A   SHOWA DENKO KK (SHOW)   IMAMURA K,  JIYON E J,  DAGURASU E S,  IZAWA H,  YAMAGUCHI T;  US5888464-A   ENGELHARD CORP (ENGH)   WU J H,  WAN C,  STEGER J J;  US5945369-A   TOYOTA CHUO KENKYUSHO KK (TOYW)   KIMURA M,  MATSUOKA Y,  SOBUKAWA H,  FUKUI M,  SUDA A,  KANDORI T,  UKYO Y;  US5948683-A   ENGELHARD CORP (ENGH)   KOERMER G S,  MOINI A;  US5972830-A   TOYOTA JIDOSHA KK (TOYT)   YOSHIDA T,  MURACHI M,  TSUJI S,  TAGUCHI N;  US6033634-A   ISHIKAWAJIMA HARIMA HEAVY IND (ISHI)   KOGA M;  US6040265-A   ASEC MFG (ASEC-Non-standard)   NUNAN J G;  US6107240-A   ENGELHARD CORP (ENGH)   WU J H,  WAN C;  US6150288-A   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  SOBUKAWA H;  US20020071806-A1   ;  US20020073895-A1   ;  US20020110519-A1   ;  US6171572-B1   ANAN KASEI CO LTD (ANAN-Non-standard)   AOZASA S;  US6204219-B1   GRACE & CO-CONN W R (GRAC)   BREZNY R,  KORANNE M M;  US6326329-B1   ASEC MFG (ASEC-Non-standard)   NUNAN J G;  US6455182-B1   UTC FUEL CELLS LLC (UNAC)   SILVER R G;  WO2003082740-A1 -- US5888464-A   ENGELHARD CORP (ENGH)   WU J H,  WAN C,  STEGER J J;  US5972830-A   TOYOTA JIDOSHA KK (TOYT)   YOSHIDA T,  MURACHI M,  TSUJI S,  TAGUCHI N;  US6150288-A   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  SOBUKAWA H;  US6171572-B1   ANAN KASEI CO LTD (ANAN-Non-standard)   AOZASA S;  WO2003082741-A1 -- US5464606-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  BUSWELL R F,  CLAUSI J V;  US5888464-A   ENGELHARD CORP (ENGH)   WU J H,  WAN C,  STEGER J J;  US5972830-A   TOYOTA JIDOSHA KK (TOYT)   YOSHIDA T,  MURACHI M,  TSUJI S,  TAGUCHI N;  US6171572-B1   ANAN KASEI CO LTD (ANAN-Non-standard)   AOZASA S;  US6306794-B1   TOYOTA CHUO KENKYUSHO KK (TOYW)   SUZUKI T,  SOBUKAWA H;  US6455182-B1   UTC FUEL CELLS LLC (UNAC)   SILVER R G