The Modern Computer By alannamcreel Jun 26, 1946 ENIAC 1 Patent was filed John Mauchly and John Presper Eckert were the two men to develop and file the patent for ENIAC I. Dec 23, 1947 The transitsor is invented. The transistor is invented by John Bardeen, Walter Brattain and Wiliam Shockley at Bells Labs. Mar 31, 1951 The first UNIVAC is accpeted by the US Census Bureau. Apr 29, 1952 IBM 701 was announced to the public. Feb 4, 1964 ENIAC 1 Patent is published