US2004131916-A1 -- US5176966-A   BALLARD POWER SYSTEMS INC (BLRD)   EPP D G,  WIENS B I;  US5482792-A   DE NORA PERMELEC SPA (ORON)   FAITA G,  MANTEGAZZA C;  US5683828-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  US5798187-A   UNIV CALIFORNIA (REGC)   WILSON M S,  ZAWODZINSKI C;  US5863673-A   BALLARD POWER SYSTEMS INC (BLRD)   CAMPBELL S A,  STUMPER J,  WILKINSON D P,  DAVIS M T;  US5976726-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  STUMPER J,  CAMPBELL S A,  DAVIS M T,  LAMONT G J;  US6051331-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  US6060190-A   BALLARD POWER SYSTEMS INC (BLRD)   CAMPBELL S A,  WILKINSON D P,  DAVIS M T,  STUMPER J;  US6103077-A   DE NORA SPA (ORON)   DEMARINIS M,  DE CASTRO E S,  ALLEN R J,  SHAIKH K;  US6207310-B1   UNIV CALIFORNIA (REGC)   WILSON M S,  ZAWODZINSKI C;  US6309769-B1   PLUG POWER INC (PLUG-Non-standard)   HAUG A T;  US6555261-B1   3M INNOVATIVE PROPERTIES CO (MINN)   LEWINSKI K A,  JOHNSTON R P,  HERDTLE T,  YLITALO D A;  WO2004059043-A1 -- US5798187-A   UNIV CALIFORNIA (REGC)   WILSON M S,  ZAWODZINSKI C;  US6207310-B1   UNIV CALIFORNIA (REGC)   WILSON M S,  ZAWODZINSKI C;  US6309769-B1   PLUG POWER INC (PLUG-Non-standard)   HAUG A T;  US7294425-B2 -- US5176966-A   BALLARD POWER SYSTEMS INC (BLRD)   EPP D G,  WIENS B I;  US5482792-A   DE NORA PERMELEC SPA (ORON)   FAITA G,  MANTEGAZZA C;  US5683828-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  US5798187-A   UNIV CALIFORNIA (REGC)   WILSON M S,  ZAWODZINSKI C;  US5863673-A   BALLARD POWER SYSTEMS INC (BLRD)   CAMPBELL S A,  STUMPER J,  WILKINSON D P,  DAVIS M T;  US5976726-A   BALLARD POWER SYSTEMS INC (BLRD)   WILKINSON D P,  STUMPER J,  CAMPBELL S A,  DAVIS M T,  LAMONT G J;  US6051331-A   AEROJET GEN CORP (AERG)   SPEAR R G,  MUEGGENBURG H H,  HODGE R;  US6060190-A   BALLARD POWER SYSTEMS INC (BLRD)   CAMPBELL S A,  WILKINSON D P,  DAVIS M T,  STUMPER J;  US6103077-A   DE NORA SPA (ORON)   DEMARINIS M,  DE CASTRO E S,  ALLEN R J,  SHAIKH K;  US6207310-B1   UNIV CALIFORNIA (REGC)   WILSON M S,  ZAWODZINSKI C;  US6309769-B1   PLUG POWER INC (PLUG-Non-standard)   HAUG A T;  US6555261-B1   3M INNOVATIVE PROPERTIES CO (MINN)   LEWINSKI K A,  JOHNSTON R P,  HERDTLE T,  YLITALO D A