ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,425,728, issued on Sept. 23, was assigned to CANON K.K. (Tokyo).

"Image pickup apparatus, accessory apparatus, and communication control method" was invented by Koji Okada (Tochigi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A camera is operable while a plurality of accessory apparatuses are connected to the camera. The camera is configured to control communication with the plurality of accessory apparatuses using a notification channel for notification with the plurality of accessory apparatuses and a data communication channel for data communication with the plurality of accessory apparatuses. The camera is configured to perform first commu...