Changes

The USPTO has defined four patent types. [http://www.uspto.gov/web/offices/ac/ido/oeip/taf/patdesc.htm] The four patent types allow for exclusionary rights, rights awarded to the patent holder to choose who can make, sell or use the patent. The scope of exclusionary rights is decided on a patent to patent basis. U.S. Code: Title 35 provides detailed explanations of patent law and patent types. [https://www.law.cornell.edu/uscode/text/35]