A designation required on all federal trademark applications that identifies the kinds of goods or services for which a particular mark will be used. This information is available for those searching for prior uses of a mark prior to adopting it. A good search strategy is to broaden the scope of the search for those classes in which the proposed mark may potentially belong. The application fee for a federal registration includes registration for only one international class. Additional classes can be added at a cost per class. Click here for a list of all international classes.