First, if the quilt designs are your own original(s), then you have to make them legal by having a copyright. Go to the website for the U.S. Copyright Office, www.copyright.gov and follow the instructions on the home page web for Visual Arts.
I have included my reference to prevent plagiarism.
REFERENCE:
"Copyright refers to a bundle of exclusive rights, consisting of the right to make copies of the work; the right to distribute copies of the work to the public; the right to display the work to the public; and the right to prepare works based on or derived from the work. You have to pay for the copyright registration of your design and this is the only way to register a copyright in the USA".
Reference obtained April 7, 2011 from
Cox M., copyright 2008,
"Quilter's catalog/A comprehensive resource guide" chap.8, p.516