Getting in a Tangle: Copyright & Public Domain

 Like many I'm somewhat bemused that *some* claim copyright to patterns they use in their doodles( or as some call by the trademarked term zentangles). Since I'm not claiming to be a copyright attorney please do check the US Copyright Office links, etc.  Many of the motifs/patterns have been used for centuries in various cultures. Just google Basket Weave Pattern or greek key pattern for example