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:
Apr. 19, 1994
Filed:
Oct. 15, 1991
Applicant:
Inventors:
Erwin Lob, Munchen, DE;
Hansjurgen Merkle, Munchen, DE;
Alexander Hierweger, Munchen, DE;
Wolfgang Killar, Munchen, DE;
Wittlich Kaule, Emmering, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ; G06K / ; B42D / ;
U.S. Cl.
CPC ...
235487 ; 235491 ; 235493 ; 235494 ; 283 85 ;
Abstract
A multilayer card-shaped data carrier has a layer appearing black in the visible wave range, but transparent or permeable to electromagnetic radiation in the invisible wavelength spectrum outside the wavelengths substantially between about 400 and 700 nanometers. The data carrier also has data markings camouflaged by the black layer produced within or below the black layer by a lasing device, which are likewise detectable by commercial optical readers operating in the invisible wavelength spectrum outside the wavelengths substantially between about 400 and 700 nanometers.