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.)
ANONIMA ITALVOX SOC
Original Assignee
ANONIMA ITALVOX SOC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ANONIMA ITALVOX SOCfiledCriticalANONIMA ITALVOX SOC
Application grantedgrantedCritical
Publication of FR789007ApublicationCriticalpatent/FR789007A/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
G03B21/16—Cooling; Preventing overheating
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR789007D1934-05-151935-04-18Procédé et appareil pour le filtrage de la lumière en vue d'en séparer les composants plus calorifiques
ExpiredFR789007A
(fr)