US2004028976-A1 -- US4033308-A   NISSAN MOTOR CO LTD (NSMO)   HAYASHI Y,  NAKAJIMA Y,  SUGIHARA K,  AOYAMA S;  US4154919-A   ACUREX CORP (ACUR-Non-standard)   SHERATTE M B;  US4535144-A   CELANESE CORP (CELA)   CHOE E W,  CONCIATORI A B;  US4814399-A   HOECHST CELANESE CORP (FARH)   SANSONE M J,  GUPTA B,  STACKMAN R W;  US4898917-A   HOECHST CELANESE CORP (FARH)   SANSONE M J;  US4933397-A   HOECHST CELANESE CORP (FARH)   SANSONE M J,  KWIATEK M S;  US4997892-A   HOECHST CELANESE CORP (FARH)   SANSONE M J,  GUPTA B,  FORBES C E,  KWIATEK M S;  US5422411-A   BALLARD POWER SYSTEMS INC (BLRD)   WEI J,  STONE C,  STECK A E;  US5525436-A   UNIV CASE WESTERN RESERVE (UCWR)   SAVINELL R F,  LITT M H;  US5599639-A   HOECHST CELANESE CORP (FARH)   OGATA N,  SANSONE M J,  ONORATO F J;  US5716727-A   UNIV CASE WESTERN RESERVE (UCWR)   SAVINELL R F,  LITT M H;  US6632847-B1   AXIVA GMBH (AXIV-Non-standard)   SOCZKA-GUTH T,  FRANK G,  BAURMEISTER J,  PAWLIK J,  KNAUF R;  US6790931-B2   AXIVA GMBH (AXIV-Non-standard)   CUI W,  GUTH T,  FRANK G;  US6987163-B2 -- US4033308-A   NISSAN MOTOR CO LTD (NSMO)   HAYASHI Y,  NAKAJIMA Y,  SUGIHARA K,  AOYAMA S;  US4154919-A   ACUREX CORP (ACUR-Non-standard)   SHERATTE M B;  US4535144-A   CELANESE CORP (CELA)   CHOE E W,  CONCIATORI A B;  US4814399-A   HOECHST CELANESE CORP (FARH)   SANSONE M J,  GUPTA B,  STACKMAN R W;  US4898917-A   HOECHST CELANESE CORP (FARH)   SANSONE M J;  US4933397-A   HOECHST CELANESE CORP (FARH)   SANSONE M J,  KWIATEK M S;  US4997892-A   HOECHST CELANESE CORP (FARH)   SANSONE M J,  GUPTA B,  FORBES C E,  KWIATEK M S;  US5422411-A   BALLARD POWER SYSTEMS INC (BLRD)   WEI J,  STONE C,  STECK A E;  US5525436-A   UNIV CASE WESTERN RESERVE (UCWR)   SAVINELL R F,  LITT M H;  US5599639-A   HOECHST CELANESE CORP (FARH)   OGATA N,  SANSONE M J,  ONORATO F J;  US5716727-A   UNIV CASE WESTERN RESERVE (UCWR)   SAVINELL R F,  LITT M H;  US6632847-B1   AXIVA GMBH (AXIV-Non-standard)   SOCZKA-GUTH T,  FRANK G,  BAURMEISTER J,  PAWLIK J,  KNAUF R;  US6790931-B2   AXIVA GMBH (AXIV-Non-standard)   CUI W,  GUTH T,  FRANK G