Inventor, Mathematician. He received notoriety for inventing the Stone Common Battery and holding 120 United States patents for pioneer instruments used in the construction of the wireless telegraph and telephone. In 1943 he was credited posthumously with another invention when the United States Supreme Court overturned Guglielmo Marconi's patent No. 7777 stating that Stone along with two other pioneers of the radio invention, Nikola Tesla and Oliver Lodge, had developed the radio-tuning apparatus at least two years sooner than Marconi. Born the son of American Civil War Union Brigadier General Charles Pomeroy Stone and his second wife Annie Stone, he traveled as a child with his family on deployment to Egypt and the Mediterranean. He became fluent in several languages in his travels. After returning to the United States, he attended a private prep school before Columbia University School of Mines and John Hopkins University. Beginning his career in 1890, he was an "experimentalist" for the American Bell Telephone Company laboratory in Boston, Massachusetts. Nine years later, he became a lecturer on electrical oscillations at the Massachusetts Institute of Technology in Boston. In 1900 he became the director, vice-president, and chief engineer of the newly incorporated Stone Telegraph & Telephone Company. The company made and leased wireless telegraph apparatus. He was successful in selling the company and patents in 1906 to Lee De Forest's Radio Telephone Company, but still was a shareholder. From 1902 to 1910, he served as president of the company along with being the chief engineer. In 1911 he published the professional journal article"Maximum Current in the Secondary of Transformer" in the "The Physical Review." During his career, he published several magazine articles. After that he became a consult for patent court cases for ten years. During this time, he was a witness for the defense for Nikola Tesla. For this and ""For his valuable pioneer contributions to the radio art", he was the recipient of the Franklin Institute Edward Longstreth Medal in 1913. In his 24-page book "John Stone on Nikola Tesla's Priority in Radio and Continuous-Wave Radiofrequency Apparatus," which was published in 1915, he gives a touching tribute to Tesla with the full credit of the "refinement of detail" embodied in the instruments for wireless communication. In 1986 a complete text of his 1915 unpublished text was published. After moving to California, he accepted a position at the American Telephone and Telegraph Company as an associate engineer-at-large of the research development remaining with the company until retiring in 1934. In 1923 he was given the Medal of Honor by what is now the Institute of Electrical and Electronics Engineers. Throughout his career, he served as president of pioneer organizations that supported engineers. In 1946 his biography was written by George H. Clark, "The Life of John Stone Stone: Mathematician, Physicist, Electrical Engineer and Great Inventor."