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Priority to FR778935ApriorityCriticalpatent/FR76453E/fr
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Publication of FR76453EpublicationCriticalpatent/FR76453E/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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FR778935A1958-11-131958-11-13Système et dispositif de projection optique pour la réalisation d'images projectées mobiles
ExpiredFR76453E
(fr)