Trademark law involves both the trademark application process as well as trademark infringement lawsuits. An attorney may represent both trademark holders as well as people challenging the legality of a trademark. Trademark law generally seeks to both protect owners of unique designs, logos and descriptions, while also protecting the public from being confused about the origin of a product or service. To enjoy trademark protection one must go through the trademark application process. In many cases this requires an experienced attorney, because the trademark application must be submitted with precision. Once a trademark is issued, people often hire a trademark attorney to bring trademark infringement lawsuits. Of course, other people may hire a trademark attorney to defend against an infringement lawsuit.