ALEXANDRIA, Va., June 4 -- United States Patent no. 12,319,477, issued on June 3.

"Locking system for flexible box" was invented by Tsing Kou Ng (Hayward, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A lockable container comprises an upper flap and a lower flap. The upper flap has a slot that also defines a tab. The lower flap has a securing structure that is partially insertable into the slot. The tab is flexibly moveable between a first position in which the tab is outside of the lower flap, and a second position in which the tab is inside of the lower flap, whereby when the tab is moved into the second position the securing structure is prevented from moving leftward by a left closed end of the s...