US2002042035-A1 -- US1478550-A   ;  US3541729-A   CANADIAN GENERAL ELECTRIC CO (GENE);  US4236899-A   SIEMENS AG (SIEI);  US4692306-A   KINETICS TEC INT (KINE-Non-standard)   MINET R G,  WARREN D;  US4847051-A   INT FUEL CELLS CORP (ITFU)   PARENTI E K;  US4909808-A   NAT AERO & SPACE ADMIN (USAS)   VOECKS G E;  US5164163-A   KOBE SEIKO SHO KK (KOBM)   AOKI M,  IMOTO Y,  SUGIMURA H,  OTANI K;  US5226928-A   TOKYO ELECTRIC POWER CO (TOEP);  KOBE SEIKO SHO KK (KOBM)   MAKABE T,  SATO H,  HAGIWARA A,  AOKI M,  SUGIMURA H,  KAWABATA T;  US5326537-A   CLEARY J M (CLEA-Individual)   CLEARY J M;  US6117578-A   INT FUEL CELLS LLC (ITFU)   LESIEUR R R;  US6126908-A   LITTLE INC ARTHUR D (LITT)   CLAWSON L G;  US6413479-B1   MATSUSHITA ELECTRIC WORKS LTD (MATW)   KUDO H,  YAMAGA N,  SHINAGAWA M;  US6481207-B2   TOKYO GAS CO LTD (TOLG)   MIURA T,  SHIRASAKI Y;  EP1197261-A2 -- EP922666-A1   MATSUSHITA ELECTRIC WORKS LTD (MATW)   KUDO H,  YAMAGA N,  SHINAGAWA M;  JP2000128505-A   TOKYO GAS CO LTD (TOLG);  MITSUBISHI JUKOGYO KK (MITO)   OTA H,  INOUE K,  SHIRASAKI Y,  IMAI T,  KOBAYASHI K,  FUJIMOTO Y;  WO2000063114-A1   ;  AU775034-B2 -- AU200038404-A   TOKYO GAS CO LTD (TOLG)   MIURA T,  SHIRASAKI Y;  EP1197261-B1 -- EP922666-A1   MATSUSHITA ELECTRIC WORKS LTD (MATW)   KUDO H,  YAMAGA N,  SHINAGAWA M;  JP2000128505-A   TOKYO GAS CO LTD (TOLG);  MITSUBISHI JUKOGYO KK (MITO)   OTA H,  INOUE K,  SHIRASAKI Y,  IMAI T,  KOBAYASHI K,  FUJIMOTO Y;  WO2000063114-A1   ;  US7037472-B2 -- EP922666-A1   MATSUSHITA ELECTRIC WORKS LTD (MATW)   KUDO H,  YAMAGA N,  SHINAGAWA M;  GB2201903-A   SHELL INT RES MIJ BV (SHEL)   DEGRAAF J D;  JP07291603-A   ;  JP11011901-A   ;  JP2000126505-A   ;  JP2000128505-A   TOKYO GAS CO LTD (TOLG);  MITSUBISHI JUKOGYO KK (MITO)   OTA H,  INOUE K,  SHIRASAKI Y,  IMAI T,  KOBAYASHI K,  FUJIMOTO Y;  US1478550-A   ;  US3541729-A   CANADIAN GENERAL ELECTRIC CO (GENE);  US4236899-A   SIEMENS AG (SIEI);  US4692306-A   KINETICS TEC INT (KINE-Non-standard)   MINET R G,  WARREN D;  US4847051-A   INT FUEL CELLS CORP (ITFU)   PARENTI E K;  US4909808-A   NAT AERO & SPACE ADMIN (USAS)   VOECKS G E;  US5164163-A   KOBE SEIKO SHO KK (KOBM)   AOKI M,  IMOTO Y,  SUGIMURA H,  OTANI K;  US5226928-A   TOKYO ELECTRIC POWER CO (TOEP);  KOBE SEIKO SHO KK (KOBM)   MAKABE T,  SATO H,  HAGIWARA A,  AOKI M,  SUGIMURA H,  KAWABATA T;  US5326537-A   CLEARY J M (CLEA-Individual)   CLEARY J M;  US6117578-A   INT FUEL CELLS LLC (ITFU)   LESIEUR R R;  US6126908-A   LITTLE INC ARTHUR D (LITT)   CLAWSON L G;  US6413479-B1   MATSUSHITA ELECTRIC WORKS LTD (MATW)   KUDO H,  YAMAGA N,  SHINAGAWA M;  US6481207-B2   TOKYO GAS CO LTD (TOLG)   MIURA T,  SHIRASAKI Y;  WO2000063114-A1   ;  WO1998008771-A2   ;  JP3808743-B2 -- JP01282113-A   ;  JP04363133-A   ;  JP05043202-A   ;  JP08217402-A   ;  JP2000159502-A   ;  JP2000178004-A   ;  JP2000219501-A   MATSUSHITA ELECTRIC WORKS LTD (MATW)   KINUKAWA K,  MIZOBUCHI M;  JP3625770-B2   TOKYO GAS CO LTD (TOLG)   MIURA T,  SHIRASAKI Y;  JP2002531247-W   JOHNSON MATTHEY PLC (JOHO)   GRAY P G,  PIGNON J F;  WO1998000361-A1