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. 24, 1999
Filed:
Sep. 25, 1996
Applicant:
Inventors:
Assignee:
Bundesdruckerei GmbH, Berlin, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03H / ;
U.S. Cl.
CPC ...
359-2 ; 359 12 ; 359 28 ;
Abstract
A process for the manufacture of non-replicable holograms possessing authenticity features which are copies of a master hologram. To form a master hologram, a hologram is taken of a randomly structured optical element, for example of a ground glass screen or a diffusor. The resulting hologram forms an authenticity feature, with an optical system which leads to a hologram with a pattern of lines that are parallel to one another.