US2003022950-A1 -- US3982962-A   UNITED TECHNOLOGIES CORP (UNAC);  US4522894-A   ENGELHARD MINERALS CORP (ENGH)   HWANG H S,  HECK R M,  YARRINGTON R M;  US4670359-A   ENGELHARD MINERALS CORP (ENGH)   BESHTY B S,  WHELAN J A;  US4781241-A   INT FUEL CELLS CORP (ITFU)   MISAGE R,  SCHEFFLER G W,  SETZER H J,  MARGIOTT P R,  PARENTI E K;  US5360679-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  WATKINS D S,  COHEN R,  BUSWELL R F,  CLAUSI J V;  US6063515-A   BALLARD POWER SYSTEMS INC (BLRD)   EPP D G,  BAUMERT R M;  US6077620-A   GENERAL MOTORS CORP (GENK)   PETTIT W H;  DE10136970-A1 -- DE3630311-A   LINDE AG (LINM)   SCHRAMM W,  HILDEBRAND U,  GLATTHAAR R;  DE10054139-A1   GENERAL MOTORS CORP (GENK)   YU T P;  DE19755813-A1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   AUTENRIETH R,  BONEBERG S,  POSCHMANN T,  SCHUESSLER M,  WIELAND S;  DE19832389-A1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   STROBEL B,  LIPPERT M,  HASSERT A,  SCHUESSLER M;  DE19904711-A1   DAIMLERCHRYSLER AG (DAIM)   KONRAD G,  LAMM A;  DE19956376-A1   XCELLSIS GMBH (XCEL-Non-standard)   KAUFMANN L;  DE19755814-C1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   SCHUESSLER M,  ZUR MEGEDE D;  DE19755815-C2   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   AUTENRIETH R,  BONEBERG S,  HEIL D,  POSCHMANN T,  WIELAND S;  DE69314245-E   AIR PROD & CHEM INC (AIRP)   ALLAM R J,  BASSETT J D,  ABRARDO J M,  DA PRATO P L;  DE3688990-G   ENGELHARD MINERALS CORP (ENGH)   BESHTY B S,  WHELAN J A;  DE10136970-C2 -- DE3630311-A   LINDE AG (LINM)   SCHRAMM W,  HILDEBRAND U,  GLATTHAAR R;  DE10054139-A1   GENERAL MOTORS CORP (GENK)   YU T P;  DE19755813-A1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   AUTENRIETH R,  BONEBERG S,  POSCHMANN T,  SCHUESSLER M,  WIELAND S;  DE19832389-A1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   STROBEL B,  LIPPERT M,  HASSERT A,  SCHUESSLER M;  DE19904711-A1   DAIMLERCHRYSLER AG (DAIM)   KONRAD G,  LAMM A;  DE19956376-A1   XCELLSIS GMBH (XCEL-Non-standard)   KAUFMANN L;  DE19755814-C1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   SCHUESSLER M,  ZUR MEGEDE D;  DE19755815-C2   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   AUTENRIETH R,  BONEBERG S,  HEIL D,  POSCHMANN T,  WIELAND S;  DE69314245-E   AIR PROD & CHEM INC (AIRP)   ALLAM R J,  BASSETT J D,  ABRARDO J M,  DA PRATO P L;  DE3688990-G   ENGELHARD MINERALS CORP (ENGH)   BESHTY B S,  WHELAN J A;  US7160523-B2 -- US3982962-A   UNITED TECHNOLOGIES CORP (UNAC);  US4522894-A   ENGELHARD MINERALS CORP (ENGH)   HWANG H S,  HECK R M,  YARRINGTON R M;  US4670359-A   ENGELHARD MINERALS CORP (ENGH)   BESHTY B S,  WHELAN J A;  US4781241-A   INT FUEL CELLS CORP (ITFU)   MISAGE R,  SCHEFFLER G W,  SETZER H J,  MARGIOTT P R,  PARENTI E K;  US5360679-A   BALLARD POWER SYSTEMS INC (BLRD)   LOUIE C,  WATKINS D S,  COHEN R,  BUSWELL R F,  CLAUSI J V;  US6063515-A   BALLARD POWER SYSTEMS INC (BLRD)   EPP D G,  BAUMERT R M;  US6077620-A   GENERAL MOTORS CORP (GENK)   PETTIT W H