ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,405,669, issued on Sept. 2, was assigned to AAC Technologies (Nanjing) Co. Ltd. (Nanjing, China).
"Vibration feedback device, handheld communication device, and wearable device" was invented by Lubin Mao (Nanjing, China), Yun Tang (Nanjing, China) and Jie Ma (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vibration feedback device, a handheld communication device including the same and a wearable device. The vibration feedback device is provided on a frame and includes a button fixed to the frame; a sensor for detecting a pressing state of the button; and a vibration motor fixed to the frame and arranged below the button. The frame incl...