(19)

(11)

EP 2 156 213 A1

(12)

(43) Date of publication: 24.02.2010 Bulletin 2010/08 (21) Application number: 08754692.5 (22) Date of filing: 23.05.2008

(51) International Patent Classification (IPC):  G01S 5/14(2006.01) (86) International application number: PCT/US2008/006608 (87) International publication number: WO 2008/150389 (11.12.2008 Gazette 2008/50)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 31.05.2007 US 941273 P 31.05.2007 US 941271 P 12.05.2008 US 119451 12.05.2008 US 119450 (71) Applicant: Navcom Technology, Inc. Torrance, California 90503 (US)	(72) Inventors: DAI, Liwen, L. Chino Hills, CA 91709 (US) ESLINGER, Daniel, J. Huntington Beach, CA 92646 (US) SHARPE, Richard, T. Torrance, CA 90503 (US) HATCH, Ronald, R. Willington, CA 90744 (US) (74) Representative: Holst, Sönke  Deere & Company European Office Global Intellectual Property Services John-Deere-Straße 70 68163 Mannheim 68163 Mannheim (DE)