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 Edison Electric Institute signed a memorandum of understanding (MOU) regarding plug-in electric vehicles (PEVs). The MOU sets up a collaboration between the government and EEI to make PEVs, by the year 2022, as affordable as regular gas-powered vehicles were in 2012. The Department of Energy runs an initiative called the "EV Everywhere Grand Challenge", which put forth the 2022 affordability goal. The program coincides with the popularity of electric vehicle sales, which have increased by 128 percent between 2012 and 2014. EEI runs a program called the Employee PEV Engagement Initiative. The goal is to "increase electric vehicle readiness, especially