×

Method of identifying a data carrier

  • US 6,179,211 B1
  • Filed: 12/08/1998
  • Issued: 01/30/2001
  • Est. Priority Date: 01/25/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of identifying a data carrier (15) carrying data in the form of a plurality of different numbers (12, 13, 14), expressible as integers in a monotonically increasing or decreasing sequence, successive numbers having a marker (11) between them, the markers being equally spaced from one another, the method including:

  • a) measuring the distance (17) from a fixed point on the data carrier (16) to a given part of a marker, characterised in that the method further includes or comprisesb) dividing this distance (17) by the distance between corresponding given parts of successive markers, thereby obtaining a rational number (x), and c) subtracting this rational number (x) from the number in the sequence adjacent the said marker if the numbers in the sequence increase in the read direction, or adding this rational number (x) to the number in the sequence adjacent the said marker if the numbers in the sequence decrease in the read direction, thereby obtaining a further rational number which is capable of identifying the data carrier uniquely.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×