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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GENEVOISE INSTR PHYSIQUE
Societe Genevoise dInstruments de Physique
Original Assignee
GENEVOISE INSTR PHYSIQUE
Societe Genevoise dInstruments de Physique
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Filing date
Publication date
Application filed by GENEVOISE INSTR PHYSIQUE, Societe Genevoise dInstruments de PhysiquefiledCriticalGENEVOISE INSTR PHYSIQUE
Application grantedgrantedCritical
Publication of FR892449ApublicationCriticalpatent/FR892449A/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
G03B21/10—Projectors with built-in or built-on screen
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR892449D1942-02-071942-05-19Dispositif pour appareil de projection
ExpiredFR892449A
(fr)