ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,656, issued on June 24, was assigned to I-TEK METAL MFG. Co. LTD (Tainan, Taiwan).
"Heavy duty lock case" was invented by Tsung-Yu Huang (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A heavy duty lock case is mounted on a door and includes a latch coupled with a door frame for retaining the door in a closed position. An anti-theft latch can be operated to engage with the door frame. The latch cooperates with an anti-pick member to avoid the latch from being picked to disengage from the door frame when the door is in the closed position. When normally operated, an inner operating device or an outer operating device can be operated to...