(19)

(11)

EP 0 482 130 A1

(12)

(43) Date of publication: 29.04.1992 Bulletin 1992/18 (21) Application number: 90917926.0 (22) Date of filing: 16.07.1990

(51) International Patent Classification (IPC):  A01G 1/ 04( . ) (86) International application number: PCT/CA1990/000222 (87) International publication number: WO 1991/001082 (07.02.1991 Gazette 1991/04)

(84) Designated Contracting States: GB (30) Priority: 14.07.1989 US 19890380098 (71) Applicants: MORRISON, Sean Bedford, Nova Scotia B4A 3B3 (CA) WALKER, Brent K. Bedford, Nova Scotia B4A 1J9 (CA)	(72) Inventors: MORRISON, Sean Bedford, Nova Scotia B4A 3B3 (CA) WALKER, Brent K. Bedford, Nova Scotia B4A 1J9 (CA) (74) Representative: Howden, Christopher Andrew, et al  FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 D-80801 München D-80801 München (DE)