04740269 is referenced by 122 patents and cites 7 patents.

In the process according to our invention authenticating (code) marks are provided on paper, particularly a security or other financial instrument, by contacting laser radiation from a laser light source on the paper to form the authenticating marks. The objects of our invention are attained with an apparatus equipped with a pivotable mirror device which allows the laser radiation to be directed on sheets of paper arranged transverse to the transport direction on a paper sheet. A preservative medium can be used to coat and protect the marks particularly from mechanical abrasion.

Title
Process and apparatus for applying authenticating coding to value-carrying paper
Application Number
6/917987
Publication Number
4740269
Application Date
October 10, 1986
Publication Date
April 26, 1988
Inventor
Hans Langer
Grafelfing
DE
Erich Berger
Vienna
AT
Agent
Herbert Dubno
Karl F Ross
Assignee
Oesterreichische Nationalbank
AT
IPC
C03C 25/06
C03C 15/00
B44C 1/22
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