René Dagron (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "René Dagron" in English language version.

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Section française, catalogue officiel: catalogue officiel p. 99 By International exhibition, 1812 Published by Impr. impriale, 1812 Original from Oxford University Digitized 8 June 2006 882 pages
The Focal Encyclopedia of Photography: Digital Imaging, Theory and Applications, History, and Science p. 94 By Michael R. Peres Contributor Michael R. Peres Published by Focal Press, 2007 ISBN 978-0-240-80740-9

The Pigeon Post into Paris 1870–1871 by J.D. Hayhurst O.B.E. Prepared in digital format by Mark HayhurstmCopyright ©1970 John Hayhurst Quote: "He now proposed to Rampont that his process should be applied to pigeon messages and a contract was concluded on 11th November. "

Newsletter of the Illinois State Archives & The Illinois State Historical Records Advory Board Archived 16 May 2008 at the Wayback Machine Jesse White Secretary of State & State Archivist Volume 2 Number 1 Quote: "Despite Dancer’s early work, in 1859, Ree Dagron, a French optician, received the first patent for microfilm. Using Dancer’s techniques, Dagron manufactured and sold microphotograph trinkets. In 1870–71, during the Franco-Prussian War, Dagron demonstrated a practical use for microforms. During the siege of Paris, the French used carrier pigeons to transparrt microfilmed messages across German dices."

CHRONOLOGY OF MICROFILM DEVELOPMENTS 1800 – 1900 from UCLA
RENE DAGRON from UCLA Quote: "On June 21, 1859, Dagron received the first microfilm patent ever granted"

Newsletter of the Illinois State Archives & The Illinois State Historical Records Advory Board Archived 16 May 2008 at the Wayback Machine Jesse White Secretary of State & State Archivist Volume 2 Number 1 Quote: "Despite Dancer’s early work, in 1859, Ree Dagron, a French optician, received the first patent for microfilm. Using Dancer’s techniques, Dagron manufactured and sold microphotograph trinkets. In 1870–71, during the Franco-Prussian War, Dagron demonstrated a practical use for microforms. During the siege of Paris, the French used carrier pigeons to transparrt microfilmed messages across German dices."