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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
G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
G02B23/22—Underwater equipment
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Optics & Photonics
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FR49203D1937-07-301937-07-30
Combination device for underwater vision, photography and cinematography
ExpiredFR49203E
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