By eHow Legal Editor
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Copyright protection and patent protection are two different notions, but they seek to do the same thing: protect the intellectual property of a person or group of people. Copyrights protect the expression of an idea, and patents protect the result of an idea (e.g., a new machine or process). The Library of Congress oversees copyrights, while the U.S. Patent and Trademark Office oversees patents. It can take only a minute or so to determine whether your idea needs copyright or patent protection if it falls into an established category (e.g., a screenplay requires copyright protection, while an invention requires patent protection), but if your idea contains both artistic and practical elements, it may take several days or weeks to determine whether you need both types of protection.