What is a Trademark? A Premier Patent Law Practice.The examples must accompany a formal application for trademark protection. Learn how to protect your trademark through the federal registration process. Review North Carolina's trade secret laws and determine if your invention qualifies as a trade secret. The Van Winkle Law Firm has an established and growing practice enforcing and defending patents, trademarks, and copyrights for its clients. For example, if you invent a new kind of vacuum cleaner, you would apply for a patent to protect the invention itself. Our Charlotte, North Carolina and Fort Mill, South Carolina trademark attorneys are experienced in protecting and enforcing common law trademark rights. Durham, North Carolina Businesses Use Cohn Legal for Trademark Services. At Dogwood Patent and Trademark Law, our goal is to have your stop with us be your last.