WO200238265-A1 -- US3336730-A   ;  US3350176-A   ;  US3409421-A   GULF RES & DEV CO (GULF);  US3469944-A   ;  US4098959-A   UNITED TECHNOLOGIES CORP (UNAC)   FANCIULLO S;  US4445909-A   PHILLIPS PETROLEUM CO (PHIP)   BURNS L D;  US5302470-A   OSAKA GAS CO LTD (OSAG);  US5861137-A   EDLUND D J (EDLU-Individual)   EDLUND D J;  US6221117-B1   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US2002083645-A1 -- US3336730-A   ;  US3350176-A   ;  US3409421-A   GULF RES & DEV CO (GULF);  US3469944-A   ;  US4098959-A   UNITED TECHNOLOGIES CORP (UNAC)   FANCIULLO S;  US4445909-A   PHILLIPS PETROLEUM CO (PHIP)   BURNS L D;  US5302470-A   OSAKA GAS CO LTD (OSAG);  US5401589-A   VICKERS SHIPBUILDING & ENG (VICS);  CJBD LTD (CJBD-Non-standard)   PALMER I,  SEYMOUR C M,  DAMS R A J;  US5432710-A   OSAKA GAS CO LTD (OSAG)   ISHIMARU K,  NAKASHIBA A,  KOGA M,  OHNISHI H,  KAWAHARA H;  US5637414-A   FUJI ELECTRIC CO LTD (FJIE)   INOUE S,  NAGAI T,  KOMATSU T,  WAKATSUKI S,  MOGI H;  US5861137-A   EDLUND D J (EDLU-Individual)   EDLUND D J;  US5932181-A   YUKONG LTD (YUKO-Non-standard)   KIM T C,  YOON G S,  CHUNG S J,  HAN J S,  HYUNG J H;  US5997594-A   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US6083637-A   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   WALZ H F,  ZUR MEGEDE D;  US6152995-A   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J;  US20030215374-A1   ;  US6221117-B1   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US6319306-B1   IDATECH LLC (BLRD)   EDLUND D J,  PLEDGER W A,  STUDEBAKER T;  US6494937-B1   IDATECH LLC (BLRD)   EDLUND D J,  HILL C R,  PLEDGER W A,  STUDEBAKER R T;  US6572837-B1   BALLARD POWER SYSTEMS INC (BLRD)   HOLLAND R,  SCHUBAK G,  BRADLEY M,  O'CONNOR K,  PEPPLEY B;  EP1339482-A1 -- DE19954548-A1   ;  DE19954548-B4   ;  US3409421-A   GULF RES & DEV CO (GULF);  US4445909-A   PHILLIPS PETROLEUM CO (PHIP)   BURNS L D;  WO2001044412-A1   ;  US7201783-B2 -- GB2283235-A   ;  JP04173895-A   ;  JP08060167-A   ;  JP10203801-A   ;  US3336730-A   ;  US3350176-A   ;  US3409421-A   GULF RES & DEV CO (GULF);  US3469944-A   ;  US4098959-A   UNITED TECHNOLOGIES CORP (UNAC)   FANCIULLO S;  US4445909-A   PHILLIPS PETROLEUM CO (PHIP)   BURNS L D;  US5302470-A   OSAKA GAS CO LTD (OSAG);  US5401589-A   VICKERS SHIPBUILDING & ENG (VICS);  CJBD LTD (CJBD-Non-standard)   PALMER I,  SEYMOUR C M,  DAMS R A J;  US5432710-A   OSAKA GAS CO LTD (OSAG)   ISHIMARU K,  NAKASHIBA A,  KOGA M,  OHNISHI H,  KAWAHARA H;  US5637414-A   FUJI ELECTRIC CO LTD (FJIE)   INOUE S,  NAGAI T,  KOMATSU T,  WAKATSUKI S,  MOGI H;  US5861137-A   EDLUND D J (EDLU-Individual)   EDLUND D J;  US5932181-A   YUKONG LTD (YUKO-Non-standard)   KIM T C,  YOON G S,  CHUNG S J,  HAN J S,  HYUNG J H;  US5997594-A   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US6083637-A   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   WALZ H F,  ZUR MEGEDE D;  US6152995-A   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J;  US20030215374-A1   ;  US6221117-B1   NORTHWEST POWER SYSTEMS LLC (BLRD)   EDLUND D J,  PLEDGER W A;  US6319306-B1   IDATECH LLC (BLRD)   EDLUND D J,  PLEDGER W A,  STUDEBAKER T;  US6494937-B1   IDATECH LLC (BLRD)   EDLUND D J,  HILL C R,  PLEDGER W A,  STUDEBAKER R T;  US6572837-B1   BALLARD POWER SYSTEMS INC (BLRD)   HOLLAND R,  SCHUBAK G,  BRADLEY M,  O'CONNOR K,  PEPPLEY B;  JP4040457-B2 -- JP09262468-A   ;  JP10203801-A   ;  JP2001270704-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   FUJII Y,  HOSAKA M,  TOMIZAWA T,  UKAI K,  TAGUCHI K,  SHONO T,  YOSHIDA Y,  KITAGAWA K