Edgar Rice Burroughs, Inc. vigorously enforces and defends its rights in the Tarzan character and stories.  In 2003, for example, the U.S. Court of Appeals for the Second Circuit affirmed the trial court's decision in ERB's favor that two Tarzan books published in 1972 and 1976 illustrated by artist Burne Hogarth are works for hire owned by ERB, notwithstanding erroneous registrations stating that Hogarth was the author of the works.

The district court initially sanctioned ERB's adversaries and their counsel, though the court later vacated the sanctions on the condition that ERB be reimbursed for certain of its attorneys' fees that had been the subject of the sanctions motion.