Thomas Edison of the Edison patent to charge a more reasonable rate for the use of the Edison patent rights and lowering the price of the electric lamp. On October 8, 1883, the US patent office ruled that Edison's patent was based on the work of William E. Sawyer and was, therefore, invalid. Litigation continued for nearly six years, until October 6, 1889, when a judge ruled that Edison's electric light improvement claim for "a filament of carbon of high resistance" was valid. To avoid a possible court battle with Joseph Swan, whose British patent had been awarded a year before Edison's,
Edison Electric Institute such as the electric grid were included in the National Cyber Strategy. After Hurricane Maria hit the island of Puerto Rico in 2017, the federal government invested $3.2 billion into restoring the island's power grid. The Edison Electric Institute deployed Carlos D. Torres, a retired vice president at Consolidated Edison, to Puerto Rico to coordinate storm rebuilding of the power grid. Subsequently, Torres was appointed by Gov. Ricardo Rossello as coordinator for storm restoration. EEI supports the use of drones (unmanned aircraft systems, or UAS) by electric power companies to maintain electric grids and restore downed service. In July 2016,