ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,239, issued on March 25, was assigned to KINPO ELECTRONICS INC. (New Taipei, Taiwan).

"Sheet detection device and detection method thereof" was invented by Tzu-Cheng Chang (New Taipei, Taiwan) and Wei-Chun Jau (New Taipei, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sheet detection device includes: a magnetic sensing element disposed on a sheet guide, wherein the sheet guide brings the magnetic sensing element to move to a first position or a second position; a first magnetic element disposed on a sheet tray corresponding to the first position; a second magnetic element disposed on the sheet tray corresponding to the second position and...