US Patent 7568295 Quilt tool

The quilting tool has a transparent, parallelogram plate and a first set of guidelines. The plate has at least a first major surface, a second major surface, a first side, a second side parallel to the first side, a third side and a fourth side parallel to the third side. The first set of guidelines has at least a plurality of individual guidelines imprinted on the first major surface of the plate. The individual guidelines are parallel to the first side of the plate and extend from the third side to the fourth side of the plate. The individual guidelines are spaced from the first side based on the equation (FB/NP)+(2×SA). FB is the finished block edge length. NP is the number of patches wanted along FB. SA is the seam allowance.