Patent 9961431 was granted and assigned to Apple (company) on May, 2018 by the United States Patent and Trademark Office.
A case for a portable listening device includes a lid and a lid sensor to detect if the lid is in an open or a closed position. The case further includes circuitry configured to turn on a wireless radio within the portable listening device when the lid sensor detects the lid is moved from the closed position to the open position.