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In page Timeline of African-American history:

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1872

  • December 11 – P. B. S. Pinchback is sworn in as the first black member of the U.S. House of Representatives.[citation needed]
  • Disputed gubernatorial election in Louisiana cause political violence for more than two years. Both Republican and Democratic governors hold inaugurations and certify local officials.[citation needed]
  • Elijah McCoy patented his first invention, an automatic lubricator that supplied oil to moving parts while a machine was still operating.[2]