In this appeal concerning in personam jurisdiction, we are asked to decide whether the presence of the defendant patent owner in the State of Washington and her activities there relating to the enforcement of her patents are sufficient to allow a federal district court in that state to exercise in personam jurisdiction over the defendants, a California corporation and a California resident. The district court held that the patent owner’s activities were not sufficient to allow it to exercise in personam jurisdiction over the defendants. We disagree, and we therefore reverse the dismissal of the complaint.