By Rob Lenihan The company wants to attract a younger audience by moving beyond antiquated attitudes. In 1953, Dwight D. Eisenhower was inaugurated as the President of the United States. The Korean War ended after three years, Sir Edmund Hillary and Tenzing Norgay made the first successful ascent to the summit of Mount Everest, and Queen Elizabeth II was crowned queen of England. ‘An Iconic Brand’And in the same year, a young man named Hugh Hefner and his associates founded Playboy magazine. They were aided by a $1,000 loan from Hefner’s mother. The first issue–undated because Hefner wasn’t s…