Copyright Infringement

      A copyright owner has certain exclusive rights. These include the rights to reproduce, distribute, display and perform the copyrighted work. The copyright owner also has the exclusive right to prepare "derivative works" which are works that are based on the original work, but the work also includes some different or additional material.
      A violation of any of the copyright owner's rights constitutes copyright infringement. Copyright infringement most commonly occurs whenever a copyrighted mark is "copied" in whole or in part. Copyright infringement may occur even when the infringing copy is not identical, but only "substantially similar" to the original work. When a substantial portion of a copyrighted work is used in another work, it also usually infringes as an unauthorized "derivative work."