Trademarks can range from a word mark, logo, device, label, hologram, a tag line, a smell, taste, shape of an article, packaging, combination of colors or even a single color. In fact, even a sound or a jingle can be registered as a trademark when graphically represented in the form of musical notes. Trademarks can be classified under the following broad categories: Product marks – marks which identify the goods in respect of which they are used; Service marks – marks which identify the services in respect of which they are used Certification marks – marks which are capable of distinguishing the goods or services in connection with which they are used in the course of trade, which are certified by the proprietor of the mark in respect of origin, material, mode of manufacture of goods or performance of service, quality, accuracy or other characteristics from goods or services not so certified. For example, WOOLMARK, ISI mark, AGMARK etc.; and Collective marks – marks which distinguish the goods or services provided by an association or membership of persons (not being a partnership within the meaning of the Indian Partnership Act, 1932) from those of others.