DeWitt Clinton Cregier
DeWitt Clinton Cregier served as mayor of Chicago, Illinois for the Democratic Party. Prior to this he was an engineer with the City of Chicago, and was awarded, in 1875, U.S. Patent 164,149 and in 1876, U.S. Patent 173,768 , both for fire hydrants. The latter was a combination drinking fountain, fire hydrant, and watering basin for animals. The Cregier hydrant is widely seen in old photographs of Chicago.
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Source: Wikipedia