Ronald Isley and Late Brother Rudolph’s Estate End Trademark Battle

The legal dispute between Ronald Isley and the estate of his late brother Rudolph Isley over ownership of the The Isley Brothers trademark has come to an end. Attorneys for both sides filed a stipulation of dismissal in federal court in Chicago on Wednesday, August 12, bringing the case to a close. The filing states that the lawsuit was dismissed with prejudice, with each side responsible for its own legal costs and attorneys’ fees. The dismissal means Rudolph’s estate cannot bring the same claims against Ronald again. No settlement details, ownership division or payment between the parties were disclosed in the court filing.
The dispute began after Ronald Isley applied in November 2021 to register exclusive rights to the The Isley Brothers trademark in his name. The U.S. Patent and Trademark Office approved the registration on August 16, 2022, covering visual and audiovisual recordings featuring music and animation. Rudolph filed suit in March 2023, arguing that the trademark should have been jointly owned by the brothers and seeking what he described as his rightful 50% share of proceeds. The complaint alleged that Ronald’s registration claims were made without Rudolph’s knowledge or approval and disputed Ronald’s assertion of exclusive ownership. The court never issued a ruling determining who legally owned the trademark, and Ronald’s registration remains in his name.
Rudolph, Ronald and their brother O’Kelly Isley Jr. formed The Isley Brothers in Cincinnati around 1954 and operated the group as a partnership, according to the lawsuit. O’Kelly died in 1986, leaving his interests to his two surviving brothers, while Rudolph stopped performing and recording with the group in 1989 but continued to participate in managing and benefiting from its assets. The complaint cited publishing, royalty and licensing arrangements as evidence of their continued shared interests, including a 2018 publishing deal and revenue from recordings and sampled music. With the dismissal, the long-running trademark dispute between the two brothers’ sides has officially ended without a court ruling on the underlying ownership claims.










