I am a fashion designer and am looking to make some extra money by drawing trendy clothes and styles and selling my drawings to companies. When posting my work for all to see, I worry that some of my ideas might be taken. Is there any way to protect my work? Is patenting my drawings through the U.S. Patent Office my only option for protection? I heard if you mailed your work to yourself, this could by law, protect your tangible ideas. Is this true?