How to classify trade marks When applying to register a trade mark, you must use the classification system to specify the goods and/or services you'll be using it on. From: Contents Introduction Intellectual Property Offices worldwide use a trade mark classification system that groups together similar goods or services into 45 different classes. This is referred to as the Nice classification. Each class contains a list of terms. These cover all the goods or services included in that class: goods are in classes 1 to 34 services are in classes 35 to 45 All classes have a broad heading explaining what’s covered in that particular class. This is only a general indication and does not include all the goods or services in that class.