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
Landscapes
Business, Economics & Management
(AREA)
Accounting & Taxation
(AREA)
Marketing
(AREA)
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Theoretical Computer Science
(AREA)
Displays For Variable Information Using Movable Means
(AREA)
Procedure et dispositif pour projeter et observer des images differenciees ou stereoscopiques, dessins, photographies, films cinematographiques ou video
Appareil de production d'enregistrement en microforme a partir de l'image d'un tube a rayons cathodiques constituant un original ou a partir d'une source contenant des donnees sous forme de diapositives