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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PICTURE MACHINE SERVICE CORP
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PICTURE MACHINE SERVICE CORP
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Publication date
Application filed by PICTURE MACHINE SERVICE CORPfiledCriticalPICTURE MACHINE SERVICE CORP
Application grantedgrantedCritical
Publication of FR683288ApublicationCriticalpatent/FR683288A/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
G03B21/14—Details
G03B21/32—Details specially adapted for motion-picture projection
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR683288D1929-10-141929-10-14Perfectionnements aux mécanismes pour le déroulement et l'enroulement de rubans oude bandes
ExpiredFR683288A
(fr)