WO200201657-A2 -- DE19517813-A1   ZENT SONNENENERGIE & WASSERSTOFF-FORSCH (SONN-Non-standard)   SCHOLTA J,  ROHLAND B;  JP01248477-A   ;  US3585078-A   ;  US3745047-A   UNITED AIRCRAFT CORP (UNAC);  WO1997042673-A1   ;  DE10031864-C1 -- DE19921216-A1   ;  DE19517813-C2   ZENT SONNENENERGIE & WASSERSTOFF-FORSCH (SONN-Non-standard)   SCHOLTA J,  ROHLAND B;  EP1061599-A1   VAILLANT GMBH & CO JOH (VAIL);  VAILLANT GMBH (VAIL);  VAILLANT NV (VAIL);  VAILLANT SARL (VAIL);  VAILLANT LTD (VAIL);  VAILLANT BV (VAIL);  VAILLANT AS (VAIL)   BIELSKI M,  THOMAS R;  US5023151-A   INT FUEL CELLS CORP (ITFU)   LANDAU M B,  VARTANIAN G,  MATSUZAWA K;  US2004038092-A1 -- US2585078-A   ;  US3745047-A   UNITED AIRCRAFT CORP (UNAC);  US5023151-A   INT FUEL CELLS CORP (ITFU)   LANDAU M B,  VARTANIAN G,  MATSUZAWA K;  US5753383-A   CARGNELLI J (CARG-Individual);  RIVARD P (RIVA-Individual);  TAYLOR B (TAYL-Individual)   RIVARD P,  CARGNELLI J,  TAYLOR B;  US6124050-A   SIEMENS AG (SIEI)   STOCK A;  EP1297582-B1 -- DE19517813-A1   ZENT SONNENENERGIE & WASSERSTOFF-FORSCH (SONN-Non-standard)   SCHOLTA J,  ROHLAND B;  JP01248477-A   ;  US3585078-A   ;  US3745047-A   UNITED AIRCRAFT CORP (UNAC);  WO1997042673-A1   ;  US7169492-B2 -- DE19517813-A1   ZENT SONNENENERGIE & WASSERSTOFF-FORSCH (SONN-Non-standard)   SCHOLTA J,  ROHLAND B;  DE1949184-B   ;  DE2157722-C   UNITED AIRCRAFT CORP (UNAC);  DE4322765-C1   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  EP377151-A   ;  EP387702-A   ;  EP1061599-A1   VAILLANT GMBH & CO JOH (VAIL);  VAILLANT GMBH (VAIL);  VAILLANT NV (VAIL);  VAILLANT SARL (VAIL);  VAILLANT LTD (VAIL);  VAILLANT BV (VAIL);  VAILLANT AS (VAIL)   BIELSKI M,  THOMAS R;  JP01248477-A   ;  US3585078-A   ;  US3745047-A   UNITED AIRCRAFT CORP (UNAC);  US5023151-A   INT FUEL CELLS CORP (ITFU)   LANDAU M B,  VARTANIAN G,  MATSUZAWA K;  US5753383-A   CARGNELLI J (CARG-Individual);  RIVARD P (RIVA-Individual);  TAYLOR B (TAYL-Individual)   RIVARD P,  CARGNELLI J,  TAYLOR B;  US6124050-A   SIEMENS AG (SIEI)   STOCK A;  WO1998032185-A1   ;  WO200201657-A3 -- DE19517813-A1   ZENT SONNENENERGIE & WASSERSTOFF-FORSCH (SONN-Non-standard)   SCHOLTA J,  ROHLAND B;  JP01248477-A   ;  US3585078-A   ;  US3745047-A   UNITED AIRCRAFT CORP (UNAC);  WO1997042673-A1