The applications for registration of Designs applied to articles are classified according to the Third Schedule of Designs Rules, 2001 for its classification. This is mainly based on the International Classification System for Industrial Designs known as Locarno Classification. Only one class number is to be mentioned in one particular application which is mandatory under the Rules. This classification has been made on the basis of Articles on which the design is applied.

Practical Example: If the design is applied to a toothbrush it will be classified under class 04-02. Similarly if the design is applied to a calculator, it will be classified in class 18-01. Subsequent application by the same proprietor for registration of same or similar design applied to any article of the same class is possible, but period of registration will be valid only up to period of previous registration of same design.