Patent · US Expired

Tracking apparatus for use in tracking an object

US5838366A · kind A · utility

5Cited by
6References
8Claims
0Family size

Inventors

Key dates

Filing dateNov 1, 1996
Grant dateNov 17, 1998
Priority date—
Expiry dateNov 1, 2016

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01S3/7864
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Tracking apparatus for use in tracking an object (4), which tracking apparatus comprises identification tag (2) which is for being attached to the object (4) and which comprises at least two colors (6,8) and a boundary (12) therebetween; a filter for filtering out colors except those colors on the identification tag (2); and a detector for detecting the boundary (12) on the identification tag (2) and thereby enabling the detected colors on the identification tag (2) to be identified from background colors (10) that may be the same as those on the identification tag (2).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.