To obtain a patent, a person must prove to the patent office that his or her invention is novel, useful, and not obvious in light of contemporary technology. To obtain a copyright, an author must prove to the copyright office that a work is novel, useful, and not a copy of another copyrighted work. A personal name can be trademarked if it has acquired a secondary meaning. Service marks are covered by the same policies and restrictions that apply to copyrights. Dilution occurs when a trademark is used, without permission, in a way that diminishes the distinctive quality of the mark. A copyright is infringed only if a work is copied in its entirety. A formula for a chemical compound is not a trade secret. A copy must be exactly the same as an original work to infringe on its copyright. A license permits the use of another's intellectual property for certain limited purposes. To obtain a patent, a person must prove to the patent office that his or her invention is novel, useful, and not obvious in light of contemporary technology. To obtain a copyright, an author must prove to the copyright office that a work is novel, useful, and not a copy of another copyrighted work. A personal name can be trademarked if it has acquired a secondary meaning. Service marks are covered by the same policies and restrictions that apply to copyrights. Dilution occurs when a trademark is used, without permission, in a way that diminishes the distinctive quality of the mark. A copyright is infringed only if a work is copied in its entirety. A formula for a chemical compound is not a trade secret. A copy must be exactly the same as an original work to infringe on its copyright. A license permits the use of another's intellectual property for certain limited purposes