WO9904616-A1 -- CH535004-A   ;  EP519887-A1   DI NICOLA GENNARO & FIGLI SPA (DNIC-Non-standard)   DI NICOLA G;  GB2076117-A   COWARD N D (COWA-Individual)   COWARD N D;  US3743898-A   ;  US3821967-A   O E STURMAN (STUR-Individual);  US4114647-A   BURWELL C J (BURW-Individual)   STURMAN O E,  GRILL B;  US4256133-A   SOLAR PROD PROMOTIO (SOLA-Non-standard);  COWARD N D (COWA-Individual)   COWARD N D,  COLLINS D G,  GAMBLING K H;  US4797820-A   ANSAN IND LTD (ANSA-Non-standard)   WILSON D A,  ANESI D W,  WILIMANSEN M S;  US4852802-A   IGGULDEN J (IGGU-Individual)   IGGULDEN J R,  STRECK D A,  PENDER J W;  US5351437-A   LISHMAN F W (LISH-Individual)   LISHMAN F W;  US3683239-A   ;  US3989066-A   BURWELL C J (BURW-Individual)   STURMAN O E,  GRILL B,  FROMAN Y;  US4107546-A   BURWELL C J (BURW-Individual)   STURMAN O E,  GRILL B;  US4108419-A   ;  US5960813-A -- CH535004-A   ;  DE3238073-A   CUSTOS ELTRN AG (CUST-Non-standard);  EP519887-A1   DI NICOLA GENNARO & FIGLI SPA (DNIC-Non-standard)   DI NICOLA G;  FR2552623-A   ;  GB2076117-A   COWARD N D (COWA-Individual)   COWARD N D;  US3212714-A   ;  US3313939-A   ;  US3683239-A   ;  US3743898-A   ;  US3821967-A   O E STURMAN (STUR-Individual);  US3989066-A   BURWELL C J (BURW-Individual)   STURMAN O E,  GRILL B,  FROMAN Y;  US4107546-A   BURWELL C J (BURW-Individual)   STURMAN O E,  GRILL B;  US4108419-A   ;  US4114647-A   BURWELL C J (BURW-Individual)   STURMAN O E,  GRILL B;  US4256133-A   SOLAR PROD PROMOTIO (SOLA-Non-standard);  COWARD N D (COWA-Individual)   COWARD N D,  COLLINS D G,  GAMBLING K H;  US4333490-A   ENTER W L (ENTE-Individual)   ENTER W L;  US4396149-A   ENERGY MANAGEMENT C (ENER-Non-standard)   HIRSCH M;  US4541563-A   MITSUBISHI MINING & CEMENT CO (MISE)   UETSUHARA T;  US4797820-A   ANSAN IND LTD (ANSA-Non-standard)   WILSON D A,  ANESI D W,  WILIMANSEN M S;  US4852802-A   IGGULDEN J (IGGU-Individual)   IGGULDEN J R,  STRECK D A,  PENDER J W;  US4980574-A   PHOTOCOMM INC (PHOT-Non-standard)   CIRRITO W J;  US5117855-A   ;  US5173855-A   NIELSEN W Y (NIEL-Individual);  SOLATROL INC (SOLA-Non-standard)   NIELSEN W Y,  LUCK J M;  US5207380-A   ;  US5251153-A   SOLATROL INC (SOLA-Non-standard)   NIELSEN W Y,  CARLIN S C,  KAISER D A;  US5337957-A   OLSON T C (OLSO-Individual)   OLSON T C;  US5341831-A   TECHNION RES & DEV FOUND LTD (TECR)   ZUR B;  US5351437-A   LISHMAN F W (LISH-Individual)   LISHMAN F W;  US5445176-A   GOFF M L (GOFF-Individual)   GOFF M L;  WO1985004120-A   ;  WO1987004275-A