Patent drawing - Stiffel Public domain image
Summary
This is a US Patent Drawing, and therefore not subject to copyright. It is to be used to illustrate the article on Sears v. Stiffel, The patent nmber is Des. 180,251. Fetchable at [1] via Internet Explorer as of 31 Dec 2008.
Licensing:
Date
2016
Source
USPTO
Copyright info
public domain