(19)

(11)

EP 0 932 888 A1

(12)

(43) Date of publication: 04.08.1999 Bulletin 1999/31 (21) Application number: 97944964.0 (22) Date of filing: 20.10.1997

(51) International Patent Classification (IPC):  E05B 65/ 00( . ) E05B 65/ 14( . ) B62D 53/ 00( . ) G08B 13/ 14( . ) (86) International application number: PCT/GB1997/002762 (87) International publication number: WO 1998/018109 (30.04.1998 Gazette 1998/17)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV RO SI (30) Priority: 19.10.1996 GB 19960021827 22.04.1997 GB 19970008120 (71) Applicant: DNA Security Systems Limited Leeds LS1 2JT (GB)	(72) Inventor: BINNS, John, Christopher, Peter Bradford BD11 1JL (GB) (74) Representative: Allen, Philippa Margaret, et al  Markgraaf Patents Limited The Crescent 54 Blossom Street York YO24 1AP York YO24 1AP (GB)