It's almost impossible to isolate the number of patents that have been filed related to automobiles. In many of these cases, those patents are guarded fiercely by the right holders. In the United States, the early days of the automobile was controlled under what was called the Selden Patent . Filed by George B. Selden in 1879, the broad patent established a basis that allows the collection of royalties on any automobile manufactured by an American automaker. It was only when tenacious car pioneer Henry Ford fought and eventually won a court battle against the Selden Patent in 1911 that a four-wheeled vehicle powered by an internal combustion engine could be developed without paying a royalties. Since the Selden patent, the procedure of protecting certain techniques and technologies for financial gain has resulted in steady employment for attorneys. However, as the automobile enters a new stage of life, some auto companies have demonstra...