Mark Dean Is a Computer scientist and engineer Mark Dean helped develop a number of landmark technologies for IBM, including the color PC monitor and the first gigahertz chip. He holds three of the company’s original nine patents
Ninety percent of microphones used today are based on the ingenuity of James Edward West, an African-American inventor born in 1931 in Prince Edwards County, VA.
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Marie Van Brittan Brown was the inventor of the first home security system. She is also credited with the invention of the first closed circuit television.
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