Tax patent

A tax patent is a patent that discloses and claims a system or method for reducing or deferring taxes. Tax patents have been granted predominantly in the United States but can be granted in other countries as well. They are considered to be a form of business method patent. They are also called "tax planning patents", "tax strategy patents", and "tax shelter patents". In September 2011, President Barack Obama signed legislation passed by the U.S. Congress that effectively prohibits the granting of tax patents in general.