All of my designs are originals, and without wishing to get too technical I own the copyrights on all of my patterns.
If you're really keen you can search the Internet and find page upon page about the legal implications of copyright, but I will provide a very brief summary here.
My patterns are for your personal use only.
You may not photocopy or otherwise distribute them.
You may not make my designs and sell them or otherwise profit from them.
If you wish to mention my designs in your publication/newspaper/blog/website etc you must include my name as the designer, and even better include my website address. If in doubt, contact me at mail@bettyknitter.com and I will be happy to discuss your requirements.
Many thanks for your consideration and understanding in this matter.