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Wrenches and Hardware Tools

History of ToolsHistory of Wrenches

Black Inventors - Facts and History

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Jack Johnson - Patent Drawings For A Wrench

From Mary Bellis,
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Jack Johnson - Patent Drawing View A

Patent Drawing View A
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The world's first African American heavyweight champion Jack Johnson patented improvements to the wrench (U.S. patent# 1,413,121) on April the 18th, 1922.

You can read about Jack Johnson's biography.

  1. Jack Johnson - Patent Drawing View A
  2. Jack Johnson - Patent Drawing View B

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