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:
Feb. 10, 1981
Filed:
Nov. 01, 1976
Applicant:
Inventor:
David L Greenaway, Birchwil, CH;
Assignee:
LGZ Landis & Gyr Zug AG, Zug, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428161 ; 101 32 ; 156221 ; 156230 ; 350168 ; 428172 ; 428179 ; 428916 ; 427162 ; 427276 ;
Abstract
There is described a process for embossing onto a document machine-readable information in the form of optical markings with a light-modifying relief structure for indicating the genuineness of the document, comprising transferring a thermoplastic layer to the document from an embossing foil by means of a hot embossing die, and simultaneously embossing the optical markings in at least the thermoplastic layer. Also described are embossed documents produced by the disclosed process.