There are no patents on ancient patterns. In ancient times, some patterns may have been the family emblems or symbols of certain powerful people at that time, such as dragons. These cannot be used indiscriminately as they will be beheading, and they no longer exist now. As long as the pattern you are looking at has not been registered with the Patent Office (you can apply for a patent by modifying the previous pattern and packaging it), you can use it however you want.