Yes, you cannot register trademarks that are too descriptive or generic. For example, you cannot register the term "CAR" for automobiles. You also cannot register a trademark that is like other marks. For example, you cannot register a trade name like HAMASON as an online bookstore because it resembles the Amazon brand name.
If you are unaware of which class or classes best protect your goods and services, we recommend you order the Trademark Comprehensive Study. Our experienced attorneys will review your product or service description and match it to the class or classes most for your business activity.