;  US2001053468-A1 -- US5170124-A   BALLARD POWER SYST (BLRD)   BLAIR J D,  DIRCKS K W;  US6713020-B2 -- JP07220741-A   ;  JP08022827-A   ;  JP09027327-A   ;  US5170124-A   BALLARD POWER SYST (BLRD)   BLAIR J D,  DIRCKS K W;  US5866423-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   SUGAWARA Y,  UCHIDA M,  FUKUOKA Y,  EDA N;  US5945229-A   GENERAL MOTORS CORP (GENK)   MELTSER M A;  US6063516-A   GENERAL MOTORS CORP (GENK);  UNIV CALIFORNIA (REGC)   NEUTZLER J K,  BORUP R L,  WEISBROD K,  GROT S A,  MELTSER M A,  GUTOWSKI S;  US6171992-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   AUTENRIETH R,  CHRISTEN A,  ZUR MEGEDE D;  US6242260-B1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   SUGAWARA Y,  UCHIDA M,  FUKUOKA Y,  EDA N;  US2004161850-A1 -- US4876115-A   US DEPT ENERGY (USAT)   RAISTRICK I D;  US5170124-A   BALLARD POWER SYST (BLRD)   BLAIR J D,  DIRCKS K W;  US5601938-A   UNIV CALIFORNIA (REGC)   MAYER S T,  KASCHMITTER J L,  PEKALA R W;  US5866423-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   SUGAWARA Y,  UCHIDA M,  FUKUOKA Y,  EDA N;  US5922488-A   EXXON RES & ENG CO (ESSO)   MARUCCHI-SOOS E,  BELLOWS R J,  BUCKLEY D T;  US5945229-A   GENERAL MOTORS CORP (GENK)   MELTSER M A;  US6063516-A   GENERAL MOTORS CORP (GENK);  UNIV CALIFORNIA (REGC)   NEUTZLER J K,  BORUP R L,  WEISBROD K,  GROT S A,  MELTSER M A,  GUTOWSKI S;  US6106965-A   MATSUDA KK (MAZD)   HIRANO S;  US6171992-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   AUTENRIETH R,  CHRISTEN A,  ZUR MEGEDE D;  US6187468-B1   HONDA MOTOR CO LTD (HOND)   SHINKAI H,  TANAKA I,  ONODERA M,  IWASAKI K,  OBA T,  KATO H,  BABA I;  US6242260-B1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   SUGAWARA Y,  UCHIDA M,  FUKUOKA Y,  EDA N;  US6329092-B1   MITSUBISHI ELECTRIC CORP (MITQ)   MAEDA H,  FUKUMOTO H,  MITSUTA K;  US6790554-B2   MAY B (MAYB-Individual);  HODGSON D R (HODG-Individual)   MAY B,  HODGSON D R;  US6921604-B2 -- JP05047389-A   ;  JP05129023-A   ;  JP05217586-A   ;  JP06029028-A   ;  JP06052862-A   ;  JP07220741-A   ;  JP08022827-A   ;  JP08117598-A   ;  JP09027327-A   ;  JP61197034-A   ;  JP62168545-A   ;  US4876115-A   US DEPT ENERGY (USAT)   RAISTRICK I D;  US5170124-A   BALLARD POWER SYST (BLRD)   BLAIR J D,  DIRCKS K W;  US5601938-A   UNIV CALIFORNIA (REGC)   MAYER S T,  KASCHMITTER J L,  PEKALA R W;  US5866423-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   SUGAWARA Y,  UCHIDA M,  FUKUOKA Y,  EDA N;  US5922488-A   EXXON RES & ENG CO (ESSO)   MARUCCHI-SOOS E,  BELLOWS R J,  BUCKLEY D T;  US5945229-A   GENERAL MOTORS CORP (GENK)   MELTSER M A;  US6063516-A   GENERAL MOTORS CORP (GENK);  UNIV CALIFORNIA (REGC)   NEUTZLER J K,  BORUP R L,  WEISBROD K,  GROT S A,  MELTSER M A,  GUTOWSKI S;  US6106965-A   MATSUDA KK (MAZD)   HIRANO S;  US6171992-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   AUTENRIETH R,  CHRISTEN A,  ZUR MEGEDE D;  US6187468-B1   HONDA MOTOR CO LTD (HOND)   SHINKAI H,  TANAKA I,  ONODERA M,  IWASAKI K,  OBA T,  KATO H,  BABA I;  US6242260-B1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   SUGAWARA Y,  UCHIDA M,  FUKUOKA Y,  EDA N;  US6329092-B1   MITSUBISHI ELECTRIC CORP (MITQ)   MAEDA H,  FUKUMOTO H,  MITSUTA K;  US6790554-B2   MAY B (MAYB-Individual);  HODGSON D R (HODG-Individual)   MAY B,  HODGSON D R