Funny this should come up . When I was at the quilt show this weekend I bought a ruler from Marilyn Doheny. There is a pattern that is copy righted that a lot of people are making as a table topper. However one person who put together the pattern took it right off her website, where Marilyn was offering it for free, took her own pictures, named it ,and copyrighted it and sold the pattern for $10 . The pattern is made with a 9° ruler. Marilyn said , take her instructions teach them to your friends, guilds, groups .But don't try to package and resell as your own. And yes she is dealing with it right now.