A federal trademark protects the branding of your product or service. Properly Presenting Prophetic and Working Examples in a Patent Application – July 1, 2021.We're going to talk about how to file your own trademark application with the united states patent and trademark office. The Trademark Functionality Doctrine limits what can be trademarked. It prevents companies from getting exclusive rights to functional features of a product. Almost anything can be a trademark if it indicates the source of your goods and services. It could be a word, slogan, design, or combination of these. Registering one's trademark with the U.S. Patent and. Who can apply for a patent? We are experts in responding to patent office rejections ("Office Actions") with a special expertise in responding to patent eligibility rejections.