Nikola Tesla inventions constitute numerous technological breakthroughs throughout his lifetime. Born in Smiljan, Croatia, in 1856, the math and physics genius contributed innovations that continue to impact our lives daily today. He held over three hundred patents, but was only recognized for some, indicating many of his ideas were tested and failed or never became well known. When Tesla came to the United States, he worked for Thomas Edison in Manhattan and was promised $50,000 if he could make Edisonâ€™s direct current method successful. As it turned out, Edisonâ€™s DC current was not as effective as Teslaâ€™s own alternating current method in transmitting electricity over long distances. When Edison reneged on his offer to pay Tesla to solve his DC power design flaws, Tesla quit and moved on to his next endeavor.