Annual report of the Commissioner of Patents for the year ..
An annual report issued in 1869 by the United States Patent Office, printed in Washington by the Government Printing Office, that lists patents granted for the year. These pages are numbered plates of engraved line drawings of mechanical devices, each labelled with a patent number, inventor name and short title. The pictures show machines such as ploughs, wheels, stoves, locks and hinges in plan and elevation, giving a designer a dense catalogue of nineteenth-century mechanical line diagrams and labelling layouts.
