Patent · US Active

Optical marking device

US12049096B2 · kind B2 · utility

0Cited by

0References

18Claims

0Family size

Assignee

CRIME SCIENCE TECHNOLOGY · FR

Inventors

Cosimo Prete · Villeneuve-d'Ascq, FR
Jérémy MALINGE · Le Mousseau, FR
Gautier Etienne Jean Alloyez · Douai, FR

Key dates

Filing date	Apr 19, 2019
Grant date	Jul 30, 2024
Priority date	—
Expiry date	Sep 13, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2211/188
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

An optical marking device including at least a first layer and a second layer disposed at least partially opposite each other, at least one of the first and second layers having an optically variable element being able to change colour between a first colour and a second colour, the first and second colours contrasting from a colour of the other layer in such a way that when the optically variable element displays the first colour, the first layer is visible and when the optically variable element displays the second colour, the second colour is visible, or when the optically variable element displays the first colour, the second layer is visible and when the optically variable element displays the second colour, the first layer is visible.

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