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Author: United States. Patent Office.
Title: Classified index of subjects of invention adopted in the U. S. Patent office, March 1, 1872.
Publication Info: Ann Arbor, Michigan: University of Michigan Library
2005
Availability:

These pages may be freely searched and displayed. Permission must be received for subsequent distribution in print or electronically. Please go to http://www.umdl.umich.edu/ for more information.

Print source: Classified index of subjects of invention adopted in the U. S. Patent office, March 1, 1872.
United States. Patent Office.

Washington: Govt. print. off., 1872.
Subject terms:
Patents -- United States
URL: http://name.umdl.umich.edu/AJQ4114.0001.001
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