Owner Origin Technologies Limited

Inventors Groves, Mark David; Rock, Timothy Michael

Agent Fraser Old & Sohn

Pub. Number AU-B-2001230334

PCT Pub. Number WO01/55744

Priority 0001808 26.01.00 GB; 0017255 13.07.00 GB

Filing date 25 January 2001

Wipo publication date 7 August 2001

Acceptance publication date 7 December 2006

G01S 7/02 (2006.01) Details of systems according to groups , , - of systems according to group

G01C 21/36 (2006.01) Navigation

G01S 5/02 (2006.01) Position-fixing by co-ordinating two or more direction or position-line determinations - using radio waves

G01S 5/06 (2006.01) Position-fixing by co-ordinating two or more direction or position-line determinations - Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements

G01S 5/14 (2006.01) Position-fixing by co-ordinating two or more direction or position-line determinations - Determining absolute distances from a plurality of spaced points of known location

G01S 7/48 (2006.01) Details of systems according to groups , , - of systems according to group

G01S 11/02 (2006.01) Systems for determining distance or velocity not using reflection or reradiation

G08G 1/0962 (2006.01) Traffic control systems for road vehicles - having an indicator mounted inside the vehicle, e.g. giving voice messages

G08G 1/0967 (2006.01) Traffic control systems for road vehicles