René Dagron
French photographer and inventor / From Wikipedia, the free encyclopedia
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René Prudent Patrice Dagron (17 March 1817 – 13 June 1900) was a French photographer and inventor. He was born in Aillières-Beauvoir, Sarthe, France.[1] On 21 June 1859, Dagron was granted the first microfilm patent in history.[2][3] Dagron is also considered the inventor of the miniature photographic jewels (French: Bijoux photographiques microscopiques) known as Stanhopes because a modified Stanhope lens is used to view the microscopic picture attached to the lens.[4] He is buried at Ivry Cemetery, Ivry-sur-Seine.