(19)

(11)

EP 0 348 410 A1

(12)

(43) Date of publication: 03.01.1990 Bulletin 1990/01 (21) Application number: 88901899.0 (22) Date of filing: 01.03.1988

(51) International Patent Classification (IPC):  B64C 39/ 06( . ) (86) International application number: PCT/GB1988/000146 (87) International publication number: WO 1988/006551 (07.09.1988 Gazette 1988/20)

(84) Designated Contracting States: DE FR IT NL SE (30) Priority: 03.03.1987 GB 19870004942 26.03.1987 GB 19870007261 (71) Applicant: HALL, Eric Blair Hounslow, Middlesex TW3 4DA (GB)	(72) Inventor: HALL, Eric Blair Hounslow, Middlesex TW3 4DA (GB) (74) Representative: King, Bertram Thomas  KINGS PATENT AGENCY LIMITED 73 Farringdon Road London EC1M 3JB London EC1M 3JB (GB)