of Motorola Corporation's portable communication products division filed the patent application for the DynaTAC, the first hand-held cellular telephone. U.S. Patent No. 3,906,166 would be granted slightly less than two years later, on September 16, 1975. Born: Bhagwant Mann, Indian politician and Chief Minister of Punjab state's 28 million residents since 2022; in Satoj village, Punjab Died: Ingeborg Bachmann, 47, Austrian author and poet, died from injuries sustained in a fire. Nicholas Tomalin, 42, British war correspondent, was killed by a Syrian missile attack on the Golan Heights while reporting on the Yom Kippur War. October 18, 1973 (Thursday) Saudi Arabia's embargo of oil exports to the U.S. began as the Middle Eastern kingdom cut its oil production by 10 percent for the rest of the month, and threatened to halt its oil shipments entirely unless the U.S. halted all military aid to Israel. At the time, the U.S. imported more oil from Canada and Venezuela, but 6% of its oil usage was of Saudi Arabian crude. By the end of the month, Arab oil production had been cut by 20% and the available worldwide supply from all nations had dropped by 12%. " Abu Dhabi, one of the United Arab Emirates, announced that it was halting all exports of oil to the United States, becoming the first Arab oil producer to completely stop shipments. The Chilean Army's Caravan of Death, led by General Sergio Arellano, arrived in Antofagasta and carried out the executions of 56 leftist prisoners who had been summarily arrested after the September 11 coup d'etat. General Joaquin Lagos, the military governor of the Antofagasta province, was outraged at the murders, many of which were carried out after torture and cutting with machetes. Lagos turned in his resignation to President Augusto Pinochet, and the Caravan's activities ended four days later. "Caravan of Death", Memoria y Justicia website. Serial killers Willie Steelman and Douglas Gretzler committed the first of 17 murders over a 22-day period, starting with the stabbing to death of Kenneth Unrein and Michael Adshade. The pair would be captured the day after killing 9 people in a household on November 7, 1973. Raisin, the Tony Award-winning Broadway musical adapted from the 1959 play A Raisin in the Sun, premiered at the 46th Street Theatre, for the first of 847 performances. Born: James Foley, American photographer and foreign journalist murdered by the ISIS terrorist group; in