ALEXANDRIA, Va., June 4 -- United States Patent no. 12,321,537, issued on June 3, was assigned to Primax Electronics Ltd. (Taipei, Taiwan).
"Mouse device" was invented by Chun-Nan Su (Taipei, Taiwan), Chun-Che Wu (Taipei, Taiwan), Sheng-An Tsai (Taipei, Taiwan), Shu-An Huang (Taipei, Taiwan) and Li-Kuei Cheng (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A mouse device includes a casing and a roller module. The roller module is disposed within the casing. The roller module includes a scroll wheel, a supporting seat, a magnetic ratchet and a permanent magnet. The supporting seat includes a first support part and a second support part. The magnetic ratchet is arranged between the scroll wheel ...