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invention category A group or set of inventions that are classified together because of common characteristics. Invention groups that include Agricultural, Communications, Computing, Energy, Transportation and more.
The U.S. Patent and Trademark Office (USPTO) issues three different kinds of patents: utility patents, design patents, and plant patents. To qualify for a utility patent -- by far the most common type of patent -- an invention must be: 1  a process or method for producing a useful, concrete, and tangible result (such as a genetic engineering procedure, an investment strategy, computer software, or a process for conducting e-commerce on the Internet).