ALEXANDRIA, Va., April 21 -- United States Patent no. 12,609,501, issued on April 21.
"Interlocking type outlet device" was invented by Chang soo Lee (Paju, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is an interlocking type outlet device including a first outlet receiving power from an external power source and supplying the power to a first equipment, a second outlet receiving the power from the external power source and supplying the power to a second equipment, a first current detector connected to the first outlet and detecting that the power is supplied to the first equipment, and a switch disposed between the external power source and the second outlet and connected to ...