ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,487,684, issued on Dec. 2, was assigned to Honor Device Co. Ltd. (Shenzhen, China).

"Signal transmission between electronic device and keyboard using high/low pass filters" was invented by Lei Ma (Shenzhen, China), Bo Ma (Shenzhen, China), Chengyu Ma (Shenzhen, China), Yingke Fu (Shenzhen, China) and Chao Wang (Shenzhen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "This application provides a signal transmission method and a related device. According to the signal transmission method, when two contact points on an electronic device are respectively in contact with two contact points on a keyboard, the electronic device may transmit a power signal...