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.)
MESCHENMOSER FRERES
Original Assignee
MESCHENMOSER FRERES
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Filing date
Publication date
Application filed by MESCHENMOSER FRERESfiledCriticalMESCHENMOSER FRERES
Application grantedgrantedCritical
Publication of FR538311ApublicationCriticalpatent/FR538311A/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
G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
G03B13/02—Viewfinders
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR538311D1921-07-081921-07-08Viseur perfectionné pour appareils photographiques
ExpiredFR538311A
(fr)