The answer is 1849...Want to know why?

Walter Hunt was an American mechanic born in New York in 1796. Throughout his life he worked as an inventor and he managed to create a variety of different devices. The lockstitch sewing machine, safety pin, a forerunner of the Winchester repeating rifle, a successful flax spinner, knife sharpener, streetcar bell, hard-coal-burning stove, artificial stone, street sweeping machinery, the velocipede, and the ice plough are his most notable creations.(Source: https://listverse.com/2013/05/13/10-under-appreciated-or-forgotten-inventors/)

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