US2006216562-A1 -- US3094391-A   ;  US3336730-A   ;  US3338681-A   ;  US3787038-A   N-I INST PRIRODNITSCH GAS (NAT-Non-standard);  US3955941-A   CALIF INST TECH (CALT-Non-standard)   HOUSEMAN J,  RUPE J H,  KUSHIDA R O;  US4003343-A   PHILLIPS PETROLEUM CO (PHIP)   LEE R C;  US4003725-A   TRIENCO INC (TRIE-Non-standard)   BUNN J W,  BUCKLEY C O;  US4098959-A   UNITED TECHNOLOGIES CORP (UNAC)   FANCIULLO S;  US4098960-A   UNITED TECHNOLOGIES CORP (UNAC)   GAGNON R N;  US4134739-A   SIEMENS AG (SIEI);  US4197152-A   GTE SYLVANIA INC (SYLV)   PALTY G,  SPEIGEL K;  US4315893-A   FOSTER WHEELER ENERGY CORP (FOSX)   MCCALLISTE R A;  US4329157-A   MONSANTO CO (MONS)   DOBO E J,  GRAHAM T E;  US4381641-A   GULF RES & DEV CO (GULF)   MADGAVKAR A M,  SWIFT H E;  US4387434-A   PROCESS TECHN INC (PROC-Non-standard)   MONCRIEF M L,  GLASS F S,  HERMANDEZ R,  CHOW E E,  HERNANDEZ R;  US4400182-A   BRITISH GAS CORP (GASC)   DAVIES H S,  GARSTANG J H,  TIMMINS C;  US4444158-A   CONOCO INC (CONO)   YOON H;  US4466253-A   GENERAL ELECTRIC CO (GENE)   JASTER H;  US4522894-A   ENGELHARD MINERALS CORP (ENGH)   HWANG H S,  HECK R M,  YARRINGTON R M;  US4533607-A   UNITED TECHNOLOGIES CORP (UNAC)   SEDERQUIST R A;  US4567857-A   NAT AERO & SPACE ADMIN (USAS)   HOUSEMAN J,  VOECKS G E;  US4583583-A   ENGELHARD CORP (ENGH)   KAUFMAN A,  WITTEL C F,  WERTH J;  US4642273-A   MITSUBISHI ELECTRIC CORP (MITQ)   SASAKI A;  US4644751-A   MASSACHUSETTS INST TECHNOLOGY (MASI)   HSY M S;  US4650814-A   KELLER A P (KELL-Individual)   KELLER A P;  US4654063-A   AIR PROD & CHEM INC (AIRP)   AGRAWAL R,  AUVIL S R;  US4657828-A   FUJI ELECTRIC MFG CO LTD (FJIE)   TAJIMA H;  US4659634-A   STRUTHERS R C (STRU-Individual)   STRUTHERS R C;  US4670359-A   ENGELHARD MINERALS CORP (ENGH)   BESHTY B S,  WHELAN J A;  US4684581-A   STRUTHERS R C (STRU-Individual)   STRUTHERS R C;  US4751151-A   INT FUEL CELLS CORP (ITFU)   HEALY H C,  KOLODNEY M,  LEVY A H,  TROCCIOLA J C;  US4810485-A   INST GAS TECHNOLOGY (IGTE)   MARIANOWSK L G,  FLEMING D K;  US4820594-A   HITACHI LTD (HITA)   SUGITA S,  KOYAMA K H N,  SHIIN A K,  SAKAGUCHI S,  KURODA M,  NOGUCHI Y;  US4838897-A   HITACHI LTD (HITA)   AMANO Y,  YOKOYAMA E,  OOYACHI H;  US4849187-A   TOYO ENG CORP (TOXS)   UOZU H,  NAITOH A,  NUMAGUCHI T;  US4904455-A   STONE & WEBSTER ENG CORP (STWE)   KARAFIAN M,  TSANG I C;  US4904548-A   FUJI ELECTRIC MFG CO LTD (FJIE)   TAJIMA H;  US4946667-A   ENGELHARD MINERALS CORP (ENGH)   BESHTY B S,  WHELAN J A;  US4981676-A   MINET R G (MINE-Individual)   MINET R G,  TSOTSIS T T;  US5030661-A   IMPERIAL CHEM IND PLC (ICIL)   LYWOOD W J;  US5141823-A   VICKERS SHIPBUILDING & ENG (VICS)   WRIGHT B J,  SEYMOUR C M,  ADAMS V W,  CATCHPOLE J P;  US5198002-A   US DEPT ENERGY (USAT)   MEI J S,  DEVAULT J,  HALOW J S;  US5200278-A   BALLARD POWER SYSTEMS INC (BLRD)   WATKINS D S,  DIRCKS K W,  EPPS D G,  GORBELL B N,  MERRITT R D;  US5229222-A   SANYO ELECTRIC CO (SAOL)   TSUTSUMI M,  NISHIZAWA N,  ITOH T,  MATSUBAYASHI T,  YONESAKI T,  SATOH K,  FURUKAWA A,  YONEZU I,  FUJITANI S,  NASAKO K,  SAITO T,  SATO K;  US5326550-A   UNIV BRITISH COLUMBIA (UYBR)   ADRIS A M,  GRACE J R,  LIM C J,  ELNASHAIE S S;  US5335628-A   AQUA CHEM INC (AQAC)   DUNBAR W R;  US5393325-A   BEND RES INC (BEND-Non-standard)   EDLUND D J;  US5401589-A   VICKERS SHIPBUILDING & ENG (VICS);  CJBD LTD (CJBD-Non-standard)   PALMER I,  SEYMOUR C M,  DAMS R A J;  US5417051-A   MANNESMANN AG (MANS);  KTI GROUP BV (KTIK-Non-standard);  ASA BV (ASAA-Non-standard)   ANKERSMIT J H,  HENDRIKS R,  BLOMEN L J M J;  US5432710-A   OSAKA GAS CO LTD (OSAG)   ISHIMARU K,  NAKASHIBA A,  KOGA M,  OHNISHI H,  KAWAHARA H;  US5498278-A   BEND RES INC (BEND-Non-standard)   EDLUND D J;  US5509942-A   DODGE C E (DODG-Individual)   DODGE C E;  US5525322-A   UNIV CALIFORNIA (REGC)   WILLMS R S;  US5527632-A   ROLLS ROYCE & ASSOC LTD (RORO)   GARDNER F J;  US5612012-A   NGK INSULATORS LTD (NIGA)   SOMA T,  TAKAHASHI T,  ISOMURA M;  US5616430-A   TOYOTA JIDOSHA KK (TOYT)   AOYAMA S;  US5631820-A   BATTELLE MEMORIAL INST (BATT)   HAMMERSTROM D J,  DONNELLY M K;  US5637259-A   CANADA MIN NATURAL RESOURCES (CNDG)   AHMED S,  PANDEY R N,  GALUSZKA J Z,  FOUDA S;  US5637414-A   FUJI ELECTRIC CO LTD (FJIE)   INOUE S,  NAGAI T,  KOMATSU T,  WAKATSUKI S,  MOGI H;  US5639431-A   TOKYO GAS CO LTD (TOLG);  MITSUBISHI JUKOGYO KK (MITO)   SHIRASAKI Y,  GONDAIRA M,  OHTA Y,  UCHIDA H,  KURODA K,  UCHIDA T,  FUJIMOTO Y,  MAKIHARA H,  OHTA S,  KOBAYASHI K;  US5645626-A   BEND RES INC (BEND-Non-standard)   EDLUND D J,  FROST C B,  NEWBOLD D D;  US5658681-A   AISIN AW CO LTD (AISW);  EQUOS RES KK (EQUS)   SATO M,  SHIRAISHI K;  US5705916-A   HALDOR TOPSOE AS (TOPS)   RUDBECK P,  AASBERG-PETERSEN K,  LAEGSGAARD J,  HOJILUND N;  US5712052-A   TOYOTA JIDOSHA KK (TOYT)   KAWATSU S;  US5714276-A   HONDA MOTOR CO LTD (HOND)   OKAMOTO T;  US5734092-A   HEWLETT-PACKARD CO (HEWP)   BAKER J W,  WANG T K;  US5741474-A   NGK INSULATORS LTD (NIGA)   ISOMURA M,  SOMA T,  TAKAHASHI T;  US5763113-A   GENERAL MOTORS CORP (GENK)   MELTSER M A,  GROT S A;  US5771476-A   BALLARD POWER SYSTEMS INC (BLRD)   MUFFORD W E,  STRASKY D G;  US5780179-A   HONDA MOTOR CO LTD (HOND);  US5782960-A   MITSUBISHI JUKOGYO KK (MITO)   OGAWA W,  KOBAYASHI T,  SUEDA N,  MATSUMOTO T,  IMAI T,  SHIROGANE S,  SHIOTA H,  UCHIDA T;  US5795666-A   JOHNSSEN W (JOHN-Individual)   JOHNSSEN W;  US5798186-A   BALLARD POWER SYSTEMS INC (BLRD);  DAIMLER-BENZ AG (DAIM)   FLETCHER N J,  BOEHM G A,  POW E G;  US5858314-A   ZTEK CORP (ZTEK-Non-standard)   HSU M S,  HOAG E D;  US5861137-A   EDLUND D J (EDLU-Individual)   EDLUND D J;  US5897766-A   TOYOTA JIDOSHA KK (TOYT)   KAWATSU S;  US5897970-A   NGK INSULATORS LTD (NIGA)   ISOMURA M,  SOMA T,  TAKAHASHI T;  US5932181-A   YUKONG LTD (YUKO-Non-standard)   KIM T C,  YOON G S,  CHUNG S J,  HAN J S,  HYUNG J H;  US5938800-A   MCDERMOTT TECHNOLOGY INC (MCDE-Non-standard)   VERRILL C L,  MCILROY R A,  PRIVETTE R M,  CHANEY L J,  KNEIDEL K E;  US6022634-A   DE NORA SPA (ORON)   RAMUNNI E,  FLEBA G,  BRAMBILLA M;  US6042956-A   SULZER HEXIS AG (SULZ)   LENEL D;  US6045772-A   INT FUEL CELLS LLC (ITFU)   SZYDLOWSKI D F,  SEDERQUIST R A;  US6045933-A   HONDA MOTOR CO LTD (HOND)   OKAMOTO T;  US6054229-A   ZTEK CORP (ZTEK-Non-standard)   HSU M S,  ONG R Y;  US6077620-A   GENERAL MOTORS CORP (GENK)   PETTIT W H;  US6083637-A   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   WALZ H F,  ZUR MEGEDE D;  US20020006535-A1   ;  US6171574-B1   JUDA ASSOC INC WALTER (JUDA-Non-standard)   JUDA W,  KRUEGER C W;  US6187066-B1   DAIMLER-BENZ AG (DAIM);  DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   BENZ U,  BONEBERG S,  HEIL D;  US6190623-B1   UOP LLC (UNVO)   SANGER R J,  SENETAR J J,  VANDEN BUSSCHE K,  TOWLER G P,  DOSHI K J;  US6201029-B1   MARATHON OIL CO (MAOC)   WAYCUILIS J J;  US6221117-B1   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US6242120-B1   IDATECH LLC (BLRD)   HERRON T G;  US6368735-B1   FORD GLOBAL TECHNOLOGIES INC (FORD)   LOMAX F D,  IJAZ M I;  US6413661-B1   GENERAL MOTORS CORP (GENK)   CLINGERMAN B J,  MOWERY K D;  US6869707-B2   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US6878474-B2   IDATECH LLC (BLRD)   DICKMAN A J,  EDLUND D J,  PLEDGER W A;  US35002-E   YAMAHA HATSUDOKI KK (YMHA)   MATSUBARA H,  MIZUNO Y,  HANASHIMA T;  US36148-E   SIEMENS AG (SIEI)   STRASSER K