Classified index of subjects of invention adopted in the U. S. Patent office, March 1, 1872.
- Notes:
- 321 p. 23 1/2cm.
- Data Provider:
- University of Michigan. Libraries
- Collection:
- Washington,: Govt. print. off., and Ann Arbor, Michigan: University of Michigan Library
- Subject Topic:
- Patents -- United States
- Language:
- eng
- Rights:
- http://quod.lib.umich.edu/t/text/accesspolicy.html
- URL:
- http://name.umdl.umich.edu/AJQ4114.0001.001