Encoding scheme for articles
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United States of America Patent
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Apr 24, 1984
Grant Date -
N/A
app pub date -
Oct 21, 1980
filing date -
Oct 21, 1980
priority date (Note) -
Expired
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Abstract
A scheme for encoding an article involves marking the article with a first material of at least one element, at least one compound of at least one element or a mixture located at a predetermined position on the article. The article is also marked with a second material of at least one element or a mixture thereof located at a predetermined position on the article. The first and second materials each have the property of emitting x-rays when subjected to a primary source of electromagnetic radiation of appropriate wavelength. The emission wavelength/wavelengths, and intensity/intensities for the first material are a predetermined, coded indication of the location of the second material. The emission wavelength/wavelengths and intensity/intensities of the second material are a predetermined identification or verification code for the article.
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