ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,728,899, issued on Sept. 8, was assigned to SAFESMART LLC (Santa Fe Springs, Calif.).
"Foldable stair assembly" was invented by Shane Joseph Wearmouth (Los Angeles).
According to the abstract* released by the U.S. Patent & Trademark Office: "A foldable stair assembly and emergency escape stairway kit. The foldable stair assembly includes a first tread section hingedly attached on a first end to a first end of a second tread section. Each of the first tread section and second tread section includes two or more treads attached to left and right rails. A mounting bracket is attached to on a distal end of the left and right rails of the second tread section. Flexible straps are attached ...