04184700 is referenced by 140 patents and cites 9 patents.

There is disclosed a document comprising a flat support member of non-thermoplastic material at least partly coated with a thermoplastic coating, in which coating are embossed optical markings having a light-modifying relief structure, said markings representing information indicating the genuineness or identity of the document. There is also disclosed a process for producing such a document, and an embossing die for use in such a process.

Title
Documents embossed with optical markings representing genuineness information
Application Number
737431
Publication Number
4184700
Application Date
September 1, 1978
Publication Date
January 22, 1980
Inventor
David L Greenaway
Oberwil
CH
Agent
Morgan Finnegan Pine Foley & Lee
Assignee
LGZ Landis & Gyr Zug
CH
IPC
B42D 15/00
B32B 3/30
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