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Publication of FR53640EpublicationCriticalpatent/FR53640E/fr
G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
G09F19/00—Advertising or display means not otherwise provided for
G09F19/12—Advertising or display means not otherwise provided for using special optical effects
G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
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FR53640D1944-05-101944-05-10Procédé et dispositif de présentation d'un texte publicitaire par projection
ExpiredFR53640E
(fr)