as an educational resource for his company's employees. (This organization would be merged with the New York-based "The Wireless Institute" in 1912, creating the Institute of Radio Engineers.) In 1906 the company tested a ship-borne "direction-finder" designed by Stone that, although fairly accurate, proved impractical as it required the entire ship to turn in order to take readings. Operating as a small independent concern, Stone found that he could not keep up with the advances in the industry, and in 1908 his company suspended operations, and was placed into receivership. Its assets, including its valuable portfolio of patents, were sold to Lee DeForest's Radio Telephone Company, for $10,000 cash and $300,000 of stock. In early 1911, he moved to New York City, once again working as a consultant. He also gained prominence as an independent expert, testifying in numerous radio patent cases. In 1912, he acted as an intermediary, making arrangements for Lee DeForest to demonstrate an early version of his three-electrode audion vacuum-tube to AT&T engineers, who re-engineered the device into an amplifier that was capable of establishing transcontinental telephone service. In 1914-1915 Stone served as president of the Institute of Radio Engineers. Later life In 1919 he permanently moved to San Diego, California, where his ailing mother resided. Here he became "an associate at large of the Department of Development & Research of the American Telephone and Telegraph Company" until his retirement in 1934. Once married and divorced, Stone died in San Diego, California on May 20, 1943, and was buried in Mt. Hope cemetery alongside his mother Jeanne Stone and sister Egypta Stone Wilson. Shortly after his death, the U.S. Supreme Court upheld a 1935 decision by the Court of Claims, which ruled that his 1900 tuning patent had priority over the U.S. counterpart (763,772) to Marconi's "four sevens" patent. Legacy John Stone Stone was issued about 120 patents in the United States, and a similar number in other countries, covering telegraph and telephone devices and radio technology. He won the Franklin Institute Edward Longstreth Medal in 1913. He was also awarded the Institute of Radio Engineers' Medal of Honor in 1923, "For his valuable pioneer contributions to the radio art", and at the presentation ceremony, Frederick A. Kolster acknowledged his contributions with the following: "No man has contributed more to the advancement of the Radio Science than has John Stone Stone, and no man is more