EP 0261780 A2 19880330 - Hidden image system.
Title (en)
Hidden image system.
Title (de)
System verdeckter Information.
Title (fr)
Système d'image cachée.
Publication
Application
Priority
US 89942486 A 19860822
Abstract (en)
A sheet is provided which upon abrasion of one surface will reveal a preprinted message without removal of an opaque cover layer.
IPC 1-7
IPC 8 full level
B41M 5/124 (2006.01); A63F 3/06 (2006.01)
CPC (source: EP)
A63F 3/0685 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0261780 A2 19880330; EP 0261780 A3 19890719; JP S6353091 A 19880307
DOCDB simple family (application)
EP 87306941 A 19870805; JP 20736787 A 19870820