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As more power stations adopted the clocks, the frequency regulation allowed them to share electricity and create an interconnected powergrid. And Warren, who eventually solved the grid-frequency problem, was actually working on a different puzzle when he came across the answer. regulated over 95 percent of all U.S.
He was granted a U.S. A decade later, the device powered the first PCs—including the IBM 5150—allowing them to perform more complex operations. He specialized in power systems analysis. at the University of Pennsylvania , in Philadelphia. patent for his invention in 1968. He retired in 2000 and became a consultant.
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