All of Halpern’s agreements with the founders of Uber were “oral agreements” and there were no written non-disclosure agreements or other paperwork, his lawyer, Christopher Dolan said. Instead Halpern has what Dolan termed “a poor man’s copyright” — a sealed envelop he mailed himself in 2005 which included information about his idea. That envelope is still sealed and now resides in his safe, Dolan said.