(19)

(11)

EP 0 370 060 A1

(12)

(43) Date of publication: 30.05.1990 Bulletin 1990/22 (21) Application number: 88907495.0 (22) Date of filing: 21.06.1988

(51) International Patent Classification (IPC):  G01C 15/ 00( . ) (86) International application number: PCT/US1988/002064 (87) International publication number: WO 1988/010407 (29.12.1988 Gazette 1988/28)

(84) Designated Contracting States: GB (30) Priority: 22.06.1987 US 19870064419 (71) Applicant: PARRA, Jorge M. New Port Richey, FL 34652 (US)	(72) Inventor: PARRA, Jorge M. New Port Richey, FL 34652 (US) (74) Representative: Wayte, Dennis Travers  BOULT, WADE & TENNANT 27 Furnival Street London, EC4A 1PQ London, EC4A 1PQ (GB)