Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Michael Hennemeyer-Schwenker0
Dirk Fischer0
Lothar Fannasch0
Date of Patent
April 3, 2007
0Patent Application Number
100697860
Date Filed
August 25, 2000
0Patent Primary Examiner
Patent abstract
The invention relates to a card-shaped data carrier consisting of at least one layer (1, 2, 3). Visually readable information in the form of a changed optical characteristic is introduced into the layer. Said characteristic is changed by irreversibly changing the material by means of a laser beam. The absorption capacity of said layer (1, 2, 3) for at least one wavelength (λ±λ) is at least partially reduced due to the laser radiation.
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