A patent is a grant of a property right by the Government to an inventor. The United States Constitution gives Congress the right to provide for patent protection in legislation in order to encourage useful inventions. The patent itself provides a detailed description of the invention, and how it is used or how to make it. Thus, if you obtain a patent you cannot keep the matter secret, which is the province of Trade Secret Law. A patent enables the owner to exclude others from making, using or selling the invention for the life of the patent.