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US Patent: 150,385
Improvement in wedges for tool-handles
Jonathan Yerkes - Philadelphia, PA

USPTO Classifications:
254/104, 403/248, 403/277

Tool Categories:
woodworking tools : hammers

Yerkes & Plumb - Philadelphia, PA

Yerkes & Plumb - Philadelphia, PA

John A. Bell
John A. Wiedersheim

Patent Dates:
Applied: Sep. 16, 1873
Granted: Apr. 28, 1874

Patent Pictures:
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According to a page on the Bryn Mawr web site, "Fayette R. Plumb's Edge Tool Works" was established 1856 by Jonathan Yerkes, succeeded 1867 by Yerkes & Plumb, and 1886 by Fayette R. Plumb. Yerkes & Plumb used a few different marks: an "anchor P", Y&P, and a Y and P with anchor in between.

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