context: In 1954, George Devol filed a patent to manufacture a robot arm, and he granted the patent in 1961. In cooperation with Joseph Engelberg, George opened a robotics company under the name Unimation, which moved in 1956. The production robots relied on the George Devol prototype, and these robots were called at that time as programmed transport machines, because of their function of transporting objects from one place to another. They used a hydraulic actuator. He also programmed the joints according to the coordinates, for example storing the corners of the joints during instruction and then repeating them during operation. Animation licensed its production to the Hwasaki Heavy Industry Company in Japan and the GuestNetfold Company in England. It is produced in Japan and England respectively. Let the changes begin in the year 1970 when the major economic blocs in Japan began to produce industrial robots
question: When was the robot used in factories?
answers.text: 1956