Influential production designer Ron Cobb passed away last week on September 21, the same day he turned 83. How influential, you ask? Here’s a partial list of film and TV he worked on — Star Wars: A New Hope, Alien, Aliens, Raiders of the Lost Ark, E.T. the Extra-Terrestrial, Conan the Barbarian, The Abyss, Back to the Future (he came up with the time tr…