Chain store is a business model, not a trademark, so the goods or services of chain stores can't be retrieved in Nice classification. General chain stores are registered in the group of 3502- Business Administration Auxiliary Industry, together with specific goods and services. For example, restaurant chain stores need to register 35 categories +43 categories. If you register a trademark in 43 types of catering services, you can open a chain restaurant with the same name without applying for registration of other trademarks. Similarly, logistics chain stores can register 35 categories.