Patent · US Expired

Data carrier

US6749925B2 · kind B2 · utility

13Cited by

10References

22Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Joachim Hoppe · Munich, DE
Yahya Haghiri-Tehrani · Munich, DE
Arno Hohmann · Munich, DE
Josef Strassmaier · Grafing, DE
Wolfgang Gauch · Otterfing, DE
Matthias Bergmann · Hersbruck, DE
Gustav Dax · Heufeld, DE

Key dates

Filing date	Jul 16, 1997
Grant date	Jun 15, 2004
Priority date	—
Expiry date	Jul 16, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24587
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The invention relates to different methods for distortion-free production of data carriers having at least in partial areas a transparent plastic layer with a surface structure in the form of a lens structure. The surface structure can be produced by cutting method or embossed by applying heat and pressure. Alternatively the surface structure can be produced as a separate element which is connected after its production with the data carrier.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.