using special optical effects

Full Title

Advertising or display means not otherwise provided for > using special optical effects

Classification Context

Section:

PHYSICS

Class:

EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS

Subclass:

DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS

Child Classifications

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• G09F 19/14 displaying different signs depending upon the view-point of the observer
• G09F 19/16 involving the use of mirrors
• G09F 19/18 involving the use of optical projection means, e.g. projection of images on clouds
• G09F 19/2 with colour-mixing effects