Encoding scheme for articles
US4445225A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1980 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Oct 21, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.