ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,181, issued on April 14.
"Portable accessible ramp system" was invented by Katheryn Johnson (Littleton, Colo.) and Michael D'Ippolito (Colorado Springs, Colo.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An accessible ramp system that comprises lightweight platforms comprised of plastic and/or recycled plastic. To provide strength and rigidity to the platform, a radially extending configuration of reinforcing stringers are used on the bottom side thereof. Each stringer extends from the center of the platform wherein an optional center support leg can be received. The thickness of each stringer generally orthogonal to the platform's flat surface t...