ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,764, issued on March 25.
"Staircase with adjustable height risers" was invented by Vaea Augustino Santos (Vallejo, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A staircase kit, device, and method that uses precut, fixed-sized components capable of producing building code-compliant staircases that can accommodate foot or more differences in home story heights. The design uses fixed-length stringers and adjustable height risers. The angle between the stringers to the floor changes depending on the height of the adjustable height risers and story height. The angles of the steps, stringers and banisters/handrails are configured to adjust with ...