Which of the following is true of patents? Question options: r. Patent law is enacted by the Congress under the power given by Article V of the Constitution. 5. A patent gives an inventor exclusive rights to make, use, or sell an invention for twenty-five years. 1" Processes may be patented but not machines. f\" A composition of matter is found in nature and can be patented. f\" A design patent gives the owner exclusive rights to use the design for fourteen years