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, the Man perfects the phonograph with his devoted staff. Trouble arises when Bunt brags to reporters that Edison has invented the electric light. Since he hasn't yet, he is condemned by the scientific community (encouraged by Taggart, whose gas stocks are threatened by the announcement). Edison “leaves science behind”, and with a Herculean trial-and-error effort, finally succeeds in inventing a practical electric light. His subsequent plans to light New York are again hindered by Taggart, who arranges it so that Edison is only given six months to complete the entire task. Nevertheless, Edison finishes the job just in time. “I’m an inventor.