The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1988
Filed:
Oct. 15, 1986
Applicant:
Inventors:
Wolfgang Becker, Neubiberg, DE;
Alexander Hierweger, Rottach-Egern, DE;
Hansjurgen Merkle, Munich, DE;
Erwin Lob, Munich, DE;
Joseph Lass, Munich, DE;
Wittich Kaule, Emmering, DE;
Assignee:
GAO Gesellschaft fur Automation und Organisation mbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B42D / ;
U.S. Cl.
CPC ...
283 70 ; 283 91 ; 283904 ;
Abstract
The present invention relates to a data carrier (identification card, bank card, credit card, etc.) in which information is provided in an inner volume area by means of a laser beam, the information being visible in the form of changes in the optical properties of the carrier material due to an irreversible change in the material caused by the laser beam and to a method for producing the data carrier and for testing it.