(19)

(11)

EP 0 575 453 A1

(12)

(43) Date of publication: 29.12.1993 Bulletin 1993/52 (21) Application number: 92907160.0 (22) Date of filing: 10.03.1992

(51) International Patent Classification (IPC):  G01V 3/ 12( . ) G01S 13/ 88( . ) (86) International application number: PCT/DK1992/000073 (87) International publication number: WO 1992/015900 (17.09.1992 Gazette 1992/24)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 11.03.1991 DK 19910000424 (71) Applicant: NIELSEN, Kristen DK- 9220 Aalborg Ost (DK)	(72) Inventor: NIELSEN, Kristen DK- 9220 Aalborg Ost (DK) (74) Representative: Olsen, Peter Vestergaard, et al  Larsen & Birkeholm A/S, Banegaardspladsen 1, P.O. Box 362 DK-1570 Copenhagen V DK-1570 Copenhagen V (DK)