138 – The Roman emperor Hadrian adopts Antoninus Pius, effectively making him his successor.
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1836 – Samuel Colt is granted a United States patent for the Colt revolver.
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Today in History – February 25
138 – The Roman emperor Hadrian adopts Antoninus Pius, effectively making him his successor.
1836 – Samuel Colt is granted a United States patent for the Colt revolver.