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Publication of FR919965ApublicationCriticalpatent/FR919965A/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
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Optics & Photonics
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FR919965D1946-01-111946-01-11Canne télescopique et périscopique pour vision à l'infini
ExpiredFR919965A
(fr)