This work first provides a general overview of the U.S. patent system, covering such issues as the patent document and patent infringement. The requirements of the invention and the conditions for patentability are discussed, detailing the patent application and the approval process. Major patent offices and international patent treaties are next examined, providing a full description of both the U.S. and international patent and classification systems. Methods for searching patent documents, the requirements of a reference, and general patent rights are discussed.