Thorn Secure Science Limited

Richard Waltham

A method of labelling an article, including a) choosing a first character string comprising an identification number chosen to represent an article or a given class of articles, the character string comprising two or more characters, b) expressing each character in said character string as a binary number having seven or more binary digits, c) storing a sequence of binary numbers corresponding to said character string in a data store, and d) attaching the data store to, or incorporating the data store in, an article. The sequence of binary numbers is preferably generated by multiplication of the identification number by an integer, followed by conversion of the resultant number into a base 84 number. The data store preferably comprises anisotropic magnetic particles having a permanent non-random orientation in predetermined spaced regions.

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Chippenham, United Kingdom

Richard Waltham