A: A patent is a government granted right to exclude others from making, using, selling, or importing an invention without the permission of the patent holder. In the United States, patents are issued only by the United States Patent & Trademark Office ("USPTO"). A patent does not grant the patent holder the right to do anything because a patented invention may infringe the rights of another patent holder.
There are three types of patents:
1) Utility Patents. A utility patent is the most common type of patent and may be issued for any new and useful process, machine, article of manufacture, or composition of matter, and any new and useful improvement thereof.
2) Plant Patents. A plant patent may be issued to anyone who invents or discovers and asexually reproduces any distinct and new variety of plants.
3) Design Patents. Design patents may be granted to anyone who invents a new, original, and ornamental design for an article of manufacture.
These classes are not always mutually exclusive. For example, a new variety of plant may be protectable with a utility patent whether or not it is eligible for plant patent protection. Also, an article of manufacture may have functional elements that are eligible for utility patent protection and other ornamental features that are eligible for design patent protection.