ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,099, issued on Jan. 13, was assigned to Ya-Ching Chan (Taichung, Taiwan) and Chih-Hsueh (Miami).
"Safety ladder" was invented by Ya-Ching Chan (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A safety ladder for mounting between a support surface and a ground surface includes two support assemblies and parallel step members pivoted between the support assemblies. Each support assembly includes first and second support rods each having upper and lower ends. The upper ends of the first support rods of the support assemblies are configured to be pivoted to the support surface. The safety ladder is movable between a use position, in whic...