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G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B23/14—Viewfinders
Landscapes
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Optics & Photonics
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FR1106407D1954-08-101954-08-10Viseur pour appareils de prise de vues photographiques, cinématographiques ou autres
ExpiredFR1106407A
(fr)