Patent drawing - Stiffel Public domain  image

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Patent drawing - Stiffel Public domain image

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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.
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Date

2016
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Source

USPTO
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public domain

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