Title (en)

HIDDEN IMAGE SYSTEM

Publication

EP 0261780 A3 19890719 (EN)

Application

EP 87306941 A 19870805

Priority

US 89942486 A 19860822

Abstract (en)

[origin: EP0261780A2] 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

A63F 3/06

IPC 8 full level

B41M 5/124 (2006.01); A63F 3/06 (2006.01)

CPC (source: EP)

A63F 3/0685 (2013.01)

Citation (search report)

• [Y] GB 1520919 A 19780809 - LINDSELIUS B A
• [YD] US 3540914 A 19701117 - LIN CHAO-HAN
• [YD] US 4111462 A 19780905 - LANGE HEINZ E, et al
• [AD] US 3682673 A 19720808 - MANSKE WENDELL J
• [A] DE 2406911 A1 19750904 - PELIKAN WERKE WAGNER GUENTHER

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