WO200202220-A1 -- US3807963-A   CONTINENTAL OIL CO (CONO);  US4904455-A   STONE & WEBSTER ENG CORP (STWE)   KARAFIAN M,  TSANG I C;  US5382271-A   IND TECHNOLOGY RES INST (ITRI)   CHENG Y,  NG M L,  YOUNG M;  US5669960-A   PRAXAIR TECHNOLOGY INC (PRAX)   COUCHE M R;  US6497856-B1 -- US3446594-A   ;  US3477832-A   ;  US3485746-A   ;  US3541729-A   CANADIAN GENERAL ELECTRIC CO (GENE);  US3551124-A   ;  US3655448-A   UNITED AIRCRAFT CORP (UNAC);  US3807963-A   CONTINENTAL OIL CO (CONO);  US3909299-A   UNITED TECHNOLOGIES CORP (UNAC)   CORRIGAN T J;  US4004947-A   UNITED TECHNOLOGIES CORP (UNAC);  US4554223-A   HITACHI LTD (HITA)   YOKOYAMA E,  KANEKO T,  AMANO Y,  SUGIMOTO S;  US4781241-A   INT FUEL CELLS CORP (ITFU)   MISAGE R,  SCHEFFLER G W,  SETZER H J,  MARGIOTT P R,  PARENTI E K;  US4904455-A   STONE & WEBSTER ENG CORP (STWE)   KARAFIAN M,  TSANG I C;  US4909808-A   NAT AERO & SPACE ADMIN (USAS)   VOECKS G E;  US4921680-A   INT FUEL CELLS CORP (ITFU);  TOSHIBA KK (TOKE)   BONK S P,  MORGANTHAL G F,  MIURA Y;  US4976747-A   INT FUEL CELLS CORP (ITFU)   SZYDLOWSKI D F,  LESIEUR R R;  US5110559-A   HITACHI LTD (HITA)   KONDO Y,  AMANO Y,  KIMURA S,  HORIUCHI S;  US5186859-A   ;  US5207185-A   GREINER L (GREI-Individual)   GREINER L,  MOARD D M;  US5284717-A   PETRO ENERGY CENT (PETR-Non-standard);  SEKIYU SANGYO KASSE (SEKI-Non-standard);  SHOWA SHELL SEKIYU KK (SHEL)   KAMASE O,  MIURA T,  KUBOTA H;  US5360679-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  WATKINS D S,  COHEN R,  BUSWELL R F,  CLAUSI J V;  US5382271-A   IND TECHNOLOGY RES INST (ITRI)   CHENG Y,  NG M L,  YOUNG M;  US5464606-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  BUSWELL R F,  CLAUSI J V;  US5470360-A   INT FUEL CELLS CORP (ITFU)   SEDERQUIST R A;  US5484577-A   BALLARD POWER SYSTEM INC (BLRD)   LEAVITT S L,  WATKINS D S,  COHEN R,  BUSWELL R F,  CLAUSI J V;  US5486313-A   SHELL INT RES MIJ BV (SHEL);  SHELL CANADA LTD (SHEL)   DE JONG K P,  SCHOONEBEEK R J,  VONKEMAN K A,  LEDNOR P W,  OUD A E M,  VAN DER ZWET G P;  US5510056-A   SHELL INT RES MIJ BV (SHEL)   JACOBS L L G,  LEDNOR P W,  LIMAHELU A G G,  SCHOONEBEEK R J,  VONKEMAN K A;  US5516344-A   INT FUEL CELLS CORP (ITFU)   CORRIGAN T J;  US5614163-A   AMOCO CORP (STAD)   KLEEFISCH M S,  UDOVICH C A,  BHATTACHARYYA A;  US5628931-A   SHELL CANADA LTD (SHEL)   LEDNOR P W,  SENDEN M M G,  VAN DER ZWET G P;  US5639401-A   SHELL INT RES MIJ BV (SHEL);  SHELL CANADA LTD (SHEL)   JACOBS L L G,  LEDNOR P W,  VAN LOON P J M,  OOSTERVELD M,  VONKEMAN K A,  WENTINCK H M,  VAN DER ZWET G P,  LANGE J P;  US5658497-A   SHELL OIL CO (SHEL)   SCHOONEBEEK R J,  VAN DER ZWET G P,  SEARCY-ROBERTS K,  LEDNOR P W,  KUMAR K N P,  LANGE J;  US5669960-A   PRAXAIR TECHNOLOGY INC (PRAX)   COUCHE M R;  US5720901-A   SHELL INT RES MIJ BV (SHEL);  SHELL CANADA LTD (SHEL)   DE JONG K P,  SCHOONEBEEK R J,  VONKEMAN K A;  US5733347-A   INT FUEL CELLS CORP (ITFU)   LESIEUR R R;  US5980857-A   BOC GROUP PLC (BRTO)   KAPOOR A,  CHEN Y,  DAVIES S P,  THOROGOOD R M,  KUMAR R;  EP1294477-A1 -- EP271299-A   ;  US2565395-A   ;  US5181937-A   STONE & WEBSTER ENG CORP (STWE)   KARAFIAN M,  TSANG I C;  US6623719-B2 -- US3446594-A   ;  US3477832-A   ;  US3485746-A   ;  US3541729-A   CANADIAN GENERAL ELECTRIC CO (GENE);  US3551124-A   ;  US3655448-A   UNITED AIRCRAFT CORP (UNAC);  US3807963-A   CONTINENTAL OIL CO (CONO);  US3909299-A   UNITED TECHNOLOGIES CORP (UNAC)   CORRIGAN T J;  US4004947-A   UNITED TECHNOLOGIES CORP (UNAC);  US4554223-A   HITACHI LTD (HITA)   YOKOYAMA E,  KANEKO T,  AMANO Y,  SUGIMOTO S;  US4781241-A   INT FUEL CELLS CORP (ITFU)   MISAGE R,  SCHEFFLER G W,  SETZER H J,  MARGIOTT P R,  PARENTI E K;  US4904455-A   STONE & WEBSTER ENG CORP (STWE)   KARAFIAN M,  TSANG I C;  US4909808-A   NAT AERO & SPACE ADMIN (USAS)   VOECKS G E;  US4921680-A   INT FUEL CELLS CORP (ITFU);  TOSHIBA KK (TOKE)   BONK S P,  MORGANTHAL G F,  MIURA Y;  US4976747-A   INT FUEL CELLS CORP (ITFU)   SZYDLOWSKI D F,  LESIEUR R R;  US5030440-A   IMPERIAL CHEM IND PLC (ICIL)   LYWOOD W J,  TWIGG M V;  US5110559-A   HITACHI LTD (HITA)   KONDO Y,  AMANO Y,  KIMURA S,  HORIUCHI S;  US5186859-A   ;  US5207185-A   GREINER L (GREI-Individual)   GREINER L,  MOARD D M;  US5284717-A   PETRO ENERGY CENT (PETR-Non-standard);  SEKIYU SANGYO KASSE (SEKI-Non-standard);  SHOWA SHELL SEKIYU KK (SHEL)   KAMASE O,  MIURA T,  KUBOTA H;  US5360679-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  WATKINS D S,  COHEN R,  BUSWELL R F,  CLAUSI J V;  US5382271-A   IND TECHNOLOGY RES INST (ITRI)   CHENG Y,  NG M L,  YOUNG M;  US5464606-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  BUSWELL R F,  CLAUSI J V;  US5470360-A   INT FUEL CELLS CORP (ITFU)   SEDERQUIST R A;  US5484577-A   BALLARD POWER SYSTEM INC (BLRD)   LEAVITT S L,  WATKINS D S,  COHEN R,  BUSWELL R F,  CLAUSI J V;  US5486313-A   SHELL INT RES MIJ BV (SHEL);  SHELL CANADA LTD (SHEL)   DE JONG K P,  SCHOONEBEEK R J,  VONKEMAN K A,  LEDNOR P W,  OUD A E M,  VAN DER ZWET G P;  US5510056-A   SHELL INT RES MIJ BV (SHEL)   JACOBS L L G,  LEDNOR P W,  LIMAHELU A G G,  SCHOONEBEEK R J,  VONKEMAN K A;  US5516344-A   INT FUEL CELLS CORP (ITFU)   CORRIGAN T J;  US5614163-A   AMOCO CORP (STAD)   KLEEFISCH M S,  UDOVICH C A,  BHATTACHARYYA A;  US5628931-A   SHELL CANADA LTD (SHEL)   LEDNOR P W,  SENDEN M M G,  VAN DER ZWET G P;  US5639401-A   SHELL INT RES MIJ BV (SHEL);  SHELL CANADA LTD (SHEL)   JACOBS L L G,  LEDNOR P W,  VAN LOON P J M,  OOSTERVELD M,  VONKEMAN K A,  WENTINCK H M,  VAN DER ZWET G P,  LANGE J P;  US5658497-A   SHELL OIL CO (SHEL)   SCHOONEBEEK R J,  VAN DER ZWET G P,  SEARCY-ROBERTS K,  LEDNOR P W,  KUMAR K N P,  LANGE J;  US5669960-A   PRAXAIR TECHNOLOGY INC (PRAX)   COUCHE M R;  US5720901-A   SHELL INT RES MIJ BV (SHEL);  SHELL CANADA LTD (SHEL)   DE JONG K P,  SCHOONEBEEK R J,  VONKEMAN K A;  US5733347-A   INT FUEL CELLS CORP (ITFU)   LESIEUR R R;  US5980857-A   BOC GROUP PLC (BRTO)   KAPOOR A,  CHEN Y,  DAVIES S P,  THOROGOOD R M,  KUMAR R