Royalties are payments made by one party (the "licensee") to another (the "licensor") for ongoing use of an asset, like intellectual property (a copyright) in this form. Royalties are typically agreed upon as a percentage of gross or net revenues derived from the use of an asset or a fixed price per unit sold of an item of such. A license agreement defines the terms under which a resource or property such as patents, trademarks, and copyrights are licensed by one party to another, either without restriction or subject to a limitation on term, business or geographic territory, type of product, etc.