Fundamental Concepts
The essential function of a trademark is to exclusively identify the commercial source or origin of products or services, so a trademark, properly called, indicates source or serves as a badge of origin. In other words, trademarks serve to identify a particular business as the source of goods or services. The use of a trademark in this way is known as trademark use. Certain exclusive rights attach to a registered mark, which can be enforced by way of an action for trademark infringement, while unregistered trademark rights may be enforced pursuant to the common law tort of passing off.
It should be noted that trademark rights generally arise out of the use of, or to maintain exclusive rights over, that sign in relation to certain products or services, assuming there are no other trademark objections.
Different goods and services have been classified by the International (Nice) Classification of Goods and Services into 45 Trademark Classes (1 to 34 cover goods, and 35 to 45 services). The idea behind this system is to specify and limit the extension of the intellectual property right by determining which goods or services are covered by the mark, and to unify classification systems around the world.
Read more about this topic: Trademark
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