Stephen Stepanian

Stephen Stepanian (February 28, 1882 – October 1964) (Armenian: Ստիվեն Ստեփանեան) was an Armenian American inventor and owner of numerous patents including the Elevator and Conveyor, Compound Tool, and the Wrench. He is also accredited as the inventor of a self-discharging motorized transit mixer that was the predecessor of the concrete mixer truck. Stepanian is often called the “father of the ready-mix concrete industry.”

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