Patent 11490998 was granted and assigned to Kyocera Corporation on November, 2022 by the United States Patent and Trademark Office.
A brush includes a head with bristles, an actuator that expands and contracts in accordance with an electric signal, a connection member that transmits vibration of the actuator to the head, and a body including a housing that houses the actuator. The direction of reciprocal vibration of the head is at a predetermined angle relative to the direction of extension of the housing.