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Publication of FR1059347ApublicationCriticalpatent/FR1059347A/fr
G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
G02B23/08—Periscopes
FR1059347D1952-06-301952-06-30Dispositif optique de sécurité pour véhicules
ExpiredFR1059347A
(fr)