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Publication of FR434961ApublicationCriticalpatent/FR434961A/en
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
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Physics & Mathematics
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Astronomy & Astrophysics
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General Physics & Mathematics
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Optics & Photonics
(AREA)
FR434961D1911-10-061911-10-06
Improvements to telescopes
ExpiredFR434961A
(en)