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Nikolaus August Ottos's four stroke engine
He made the engine in 1876, Holzhausen Germany because they burn fuel more efficiently than a two stroke. The idea had been thought of but Otto was the first to actually make it. -
Wilhelm Konrad Von's x-ray
He made the x-ray machine in 1895 at Wuerzburg university in Germany. He made it to photograph objects that were hidden, and they were shortly afterward used as an important diagnostic tool in medicine. -
Sylvester Roper
He was an entrepreneur born on November 24, 1823 and died on June 1, 1896. He lived in Francestown, New Hampshire -
Levi Strauss
He was also an entrepreneur who was born on February 26, 1829 and died on September 26, 1902. He lived in Buttenheim, Germany
