A trademark is generally a word, phrase, symbol, or design, or a combination thereof, that identifies and distinguishes the source of the goods of one party from those of others.
A service mark is the same as a trademark, except that it identifies and distinguishes the source of a service rather than goods. The terms trademark and mark refer to both trademarks and service marks.
Federal trademarks are valid in all 50 states. In addition, each state issues its own trademarks. State trademarks are superseded by federal trademarks. If a trademark is used (or intended to be used in interstate commerce or in commerce between the U.S. and a foreign country, it may be registered with the U.S. Patent and Trademark Office.
The USPTO assigns all marks containing design figurative elements a 6-digit numerical code(s) for searching purposes. This manual indexes the categories, divisions, and sections that make up these codes