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Patent 130404_IMPROVEMENT IN CALCULATING MACHINE

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Author Barbour, E. D.
Published  United States Patent Office, United States of America, 1872
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Abstract "Patent 130404_IMPROVEMENT IN CALCULATING MACHINE "
Barbour, E. D., "Patent 130404_IMPROVEMENT IN CALCULATING MACHINE ". United States Patent Office, vol. Patent No 130404, United States of America, (1872)
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1500-1899
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Engineering School of Bilbao. G building.
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DMG-Lib FaviconDMG-Lib https://www.dmg-lib.org/dmglib/handler?docum=15065009
Europeana FaviconEuropeana  http://www.europeana.eu/portal/record/2020801/dmglib_handler_docum_15065009.html
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UBCUniv. Basque C.  http://www.ehu.es/compmech/welcome/Home.html
Administrative information
Time of publication 1872

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