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GUSTAVE GEIGER
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GUSTAVE GEIGER
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Application filed by GUSTAVE GEIGERfiledCriticalGUSTAVE GEIGER
Application grantedgrantedCritical
Publication of FR358984ApublicationCriticalpatent/FR358984A/fr
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
Physics & Mathematics
(AREA)
Astronomy & Astrophysics
(AREA)
General Physics & Mathematics
(AREA)
Optics & Photonics
(AREA)
FR358984D1905-10-301905-10-30Viseur pour chambres photographiques pliantes
ExpiredFR358984A
(fr)