Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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JEANNERET ET CIE
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JEANNERET ET CIE
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Filing date
Publication date
Application filed by JEANNERET ET CIEfiledCriticalJEANNERET ET CIE
Application grantedgrantedCritical
Publication of FR565675ApublicationCriticalpatent/FR565675A/fr
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B21/00—Projectors or projection-type viewers; Accessories therefor
G03B21/54—Accessories
G03B21/56—Projection screens
G03B21/60—Projection screens characterised by the nature of the surface
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR565675D1923-05-011923-05-01Procédé et dispositifs pour l'obtention de projections en relief
ExpiredFR565675A
(fr)