On 12 May 1941 Konrad Zuse presented his Z3 in his workshop in Berlin. German Wikipedia says: Die Z3 gilt heute als erster funktionstüchtiger Computer der Welt. (The Z3 is today considered the world’s first working computer.) Its article on the machine opens more carefully and calls it one of the first working digital computers in the world. The Z3 was destroyed in an air raid on 21 December 1943. In 1941 Zuse had filed a patent application that described the machine. It was published in 1952, but other companies, among them IBM, objected. The dispute went through every court until the Federal Patent Court decided in 1967 that the inventor of the computer could not receive a patent mangels Erfindungshöhe, for lack of inventive step. Zuse himself called the English mathematician Charles Babbage den eigentlichen Vater des Computers, the real father of the computer.