Marking of articles
US5005873A · kind A · utility
130Cited by
11References
30Claims
0Family size
Inventor
Key dates
| Filing date | Jan 22, 1988 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Jan 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/14
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An article comprising a substrate having markings which are provided by at least two fluorescent materials which have different excitation spectra in the ultraviolet region of the spectrum and different emission spectra in the visible region of the spectrum. The invention also provides a method of marking an article for identification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.