Patent ID: 8470229

Claim:
A method of creating a pattern in concrete comprising: placing a first pattern mat in a first position, the first pattern mat including a bottom surface, a top surface, and a center portion surrounded by a feathered border, the bottom surface having a design stamp located within the center portion, the top surface having a first alignment mark at a junction of the feathered border and the center portion to indicate on the top surface the junction of the feathered border and the center portion which is otherwise not apparent by viewing the top surface; aligning a second alignment mark of a second pattern mat with the first alignment mark of the first pattern mat, the second pattern mat including a bottom surface, a top surface, and a center portion surrounded by a feathered border, the bottom surface having a design stamp located within the center portion, the second alignment mark being located on the top surface at the junction of the feathered border and the center portion to indicate on the top surface the junction of the feathered border and the center portion which is otherwise not apparent from by viewing top surface, wherein alignment of the second alignment mark with the first alignment mark causes the feathered borders of the first and second pattern mats to overlap and the design stamps of the first and second pattern mats to align; stamping the first pattern mat and second pattern mat into the concrete; and removing the first pattern mat and second pattern mat from the concrete.