Annual report of the Commissioner of Patents for the year ..
This is an annual report of the United States Patent Office for 1867, published in Washington by the Government Printing Office for Congress and the public. Its pages are engraved plates of patent drawings showing mechanical devices such as hoists, presses, pumps, looms, and tools, each labelled with figure numbers and patentee names. A designer can draw on the crisp line diagrams and the clear, numbered plate layouts for technical or industrial visual references.
