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 State Park Edison State Park The Edison State Park is located in the Menlo Park section of Edison, New Jersey. It is located on Christie Street, the first street in the world to be lit up by lightbulb, just off Lincoln Highway, near the Metropark Train Station. It covers a total area of . The park commemorates the site where the famous inventor Thomas Alva Edison had his Menlo Park laboratory. In his laboratory, Edison invented over 600 inventions such as the incandescent electric light and the phonograph, the latter being the first object to record and play sound. The research and