ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,212,844, issued on Jan. 28, was assigned to CANON K.K. (Tokyo).

"Electronic apparatus to which an accessory is detachably attached and its control method, and accessory detachably attached to an electronic apparatus and its control method" was invented by Takuo Tsuchiya (Kanagawa, Japan) and Nobukazu Yoshida (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electronic apparatus to which an accessory is detachably attached includes a first processing unit communicable with the accessory by a first communication method, and a second processing unit communicable with the accessory by a second communication method. The first processing unit...