ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,232, issued on Feb. 17.
"Multi-stage camping house" was invented by Youn Ho Shin (Daegu, South Korea) and Won Su Shin (Daegu, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a camping house having an expandable camping space and, more specifically, to a multi-stage camping house capable of expanding a living space by withdrawing an auxiliary chamber that is in a main chamber in which the living space is formed, and coupling an auxiliary support supporting the auxiliary chamber to a main support supporting the main chamber to be foldable, and thus, the volume can be minimized so as to improve convenience in...