Classified index of subjects of invention adopted in the U. S. Patent office, March 1, 1872.

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Title
Classified index of subjects of invention adopted in the U. S. Patent office, March 1, 1872.
Author
United States. Patent Office.
Canvas
Page 8
Publication
Washington,: Govt. print. off.,
1872.
Subject terms
Patents -- United States

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http://quod.lib.umich.edu/m/moa/AJQ4114.0001.001
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"Classified index of subjects of invention adopted in the U. S. Patent office, March 1, 1872." In the digital collection Making of America Books. https://name.umdl.umich.edu/m/moa/ajq4114.0001.001. University of Michigan Library Digital Collections. Accessed March 29, 2024.
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