Le Prince has applied for a US Patent, however, things do not go to plan. The Patent Office rejects several of the inventor's claims, forcing him to go back and re-think. This episode looks at some of Le Prince's attempts to get his designs accepted, and in the process, it uncovers for the first time, a small mistake by the Patent Office which might provide a clue as to how much the Patent Examiner, William Burke, actually understood about what Le Prince was trying to do.