The technology is patented in Italy, and protected worldwide. It was suggested that GM may have not patented its technology. It is not patented, trademarked, or service marked. Proven to be popular, the design was patented by Nintendo. In 2002 AOL successfully patented the technology. The automaker also patented retractable seatbelts. In May 1837 they patented their system. This invention was patented in U. S. 110,338. It was patented in 1920 (U.S. patent 1,329,559). In March 1997, the company patented such combination. Forsyth patented his ignition system in 1807. This compression technique was patented in 1985. The technique was patented and called "supermarionation". By 1913, over 1,000 inventions were patented by black Americans. Soon, a grooved rod was patented.