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:
Mar. 29, 1977
Filed:
Jan. 05, 1976
Hartwig Ruell, Otterfing, DT;
Siemens Aktiengesellschaft, Berlin & Munich, DT;
Abstract
A falsification-proof identity card comprises a first transparent layer on the underneath side of which conventional data is applied by printing technology. The card contains a holographic safeguard and additional safety measures such as metal structures, fluorescent structures, safety imprints and the like which are only visible in response to holographic reconstruction and/or other light applications, such as ultra-violet light. The holographic safeguard comprises a second transparent or non-transparent layer which carries on the entire surface which faces the first layer a phase hologram or an amplitude hologram which can be read out by light transmission or by light reflection, depending on the transparency of the layer, and which contains at least the visible data printed on the first layer in a direct recording.