7th January, 1943.
Tesla died in a hotel suite 3327 at 33 floor of the New Yorker Hotel, 7th January in 1943. age 87. It was officially recorded as having died of coronary thrombosis. Despite the sale of patents in the field of alternating current, Tesla died poor and in debt. On this occasion, Mayor of New York LaGuardia said:
Nikola Tesla died. He died poor, but he was one of the most helpful people who have ever lived . What is created is great, and, as time passes, it becomes even greater.
Funeral was held 12. January in the Church of St. John the Divine in Manhattan, New York. After the service the body was cremated . The ceremony was attended by about 2000 people, among whom were many significant figures and Nobel laureates. All the leading New York newspapers had their own reporters.
Urn with Tesla residues in the Nikola Tesla Museum in Belgrade.
At the funeral played his friend, violinist Zlatko Baloković, then one of the greatest virtuosos in the world, accompanied by Slovenian choir Slovan, and, at Tesla's request, Schubert's first song "Ave Maria" and then Serbian song "There away". It was noted and memorable farewell speech former Mayor of New York Fjorela Henry LaGuardia.
Later, in 1943. The U.S. Supreme Court returned the Tesla patent rights to 645,576 recognizing its primacy on the radio patent.
Soon after Tesla's death, the FBI had asked the Immigration Service seizure of all the deceased's personal belongings and documents, although Tesla was a U.S. citizen. Later, the Defense Department contacted the FBI, and Tesla's declared top secret documents. All Tesla's personal property by order of J. Edgar Hoover and the President's advisor is labeled *highly confidential* because of the nature of Tesla's inventions and patents .