ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,487,068, issued on Dec. 2.
"Apparatus for documenting stair dimensional uniformity" was invented by Christopher Neil LeBlanc (Lafayette, La.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for documenting stair dimensional uniformity which measures variations in riser heights and tread depths in a constructed stair. Improved rule stops are attachable to a carpenter's square at positions corresponding to required step dimensions. In operation, the apparatus is self-standing while being supported by and spanning between the upper and lower nosing of a step. A tread variance indicator and riser variance indicator display the amount of variance f...