(19)

(11)

EP 0 073 193 A1

(12)

(43) Date of publication: 09.03.1983 Bulletin 1983/10 (21) Application number: 81902262.0 (22) Date of filing: 14.08.1981

(51) International Patent Classification (IPC):  A01C 7/ 08( . ) A01C 15/ 04( . ) (86) International application number: PCT/AU1981/000111 (87) International publication number: WO 1982/002994 (16.09.1982 Gazette 1982/22)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL SE (30) Priority: 02.03.1981 US 19810239707 23.03.1981 AU 19810008104 (71) Applicants: RYAN, Doreen R. Warracknabeal, Vic. 3393 (AU) RYAN, Austin T. Warracknabeal, Vic. 3393 (AU)	(72) Inventor: RYAN, Austin Timothy Warracknabeal, Vic. 3393 (AU)