Marking of articles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 9, 1991
Grant Date -
N/A
app pub date -
Jan 22, 1988
filing date -
Apr 7, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
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