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Publication of CH28088ApublicationCriticalpatent/CH28088A/en
G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B23/14—Viewfinders
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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
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CH28088A1902-12-061902-12-06
Telescope attachment for guns
CH28088A
(en)