US Patent 3,996,969 for an adjustable frame loom intended for Navajo-type weaving, granted to George W. McCullough, Henrietta Tragitt McCullough and Timothy E. Doyle of Indiana. The loom has hollow uprights and legs, a telescoping upper frame held by pins at selectable heights, and a stabilizing frame that slides into the legs and can be removed for use as a warping frame. A second upright frame can be added for two-layer weaving. The scan includes the USPTO database printout (abstract, claims, description), the patent's front page, drawing sheets (FIGS. 1-6) and the printed patent text.