Patent, To: William M. Canfield From: United States Patent Office, March 1, 1875.

The Barry-Hayes Papers are maintained at Independence Seaport Museum, Philadelphia, PA. For more information, visit Signed by Acting Commissioner Ellis Spear. Patent Number 110, 432. Patent is "improvements in lubricating compounds for steam and other packing".

Main Author: United States Patent Office.
Published: 1875
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