(19)

(11)

EP 0 991 844 A1

(12)

(43) Date of publication: 12.04.2000 Bulletin 2000/15 (21) Application number: 97932275.7 (22) Date of filing: 25.06.1997

(51) International Patent Classification (IPC)7: E06B 9/06 (86) International application number: PCT/US9711/012 (87) International publication number: WO 9859/144 (30.12.1998 Gazette 1998/52)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE (71) Applicants: Cook, Gregory H. Tucson, AZ 85705 (US) Cook, Charles E. Plano, TX 75075 (US)	(72) Inventors: Cook, Gregory H. Tucson, AZ 85705 (US) Cook, Charles E. Plano, TX 75075 (US) (74) Representative: Vleck, Jan Montagu  Reddie & Grose,16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)