"The ™ symbol may be used when trademark rights are claimed in relation to a mark, but the mark has not been registered with the government trademarks office of a particular country or jurisdiction, while the ® is used to indicate that the mark has been so registered. It is not mandatory to use either symbol, although the force of convention is such that the symbols are widely used around the world. However, in various jurisdictions it is unlawful to use the ® symbol in association with a mark when that mark is not registered. Either symbol is typically placed in the top left- or right-hand corner of a mark."
"A trademark or trade mark is a distinctive sign or indicator of some kind which is used by an individual, business organization or other legal entity to uniquely identify the source of its products and/or services to consumers, and to distinguish its products or services from those of other entities. A trademark is a type of intellectual property, and typically comprises a name, word, phrase, logo, symbol, design, image, or a combination of these elements. There is also a range of non-conventional trademarks comprising marks which do not fall into these standard categories.
The owner of a registered trademark may commence legal proceedings for trademark infringement to prevent unauthorised use of that trademark. However, registration is not required. The owner of a common law trademark may also file suit, but an unregistered mark may be protectable only within the geographical area within which it has been used or in geographical areas into which it may be reasonably expected to expand.
The term trademark is also used informally to refer to any distinguishing attribute by which an individual is readily identified, such as the well known characteristics of celebrities.
When a trademark is used in relation to services rather than products, it may sometimes be called a service mark, particularly in the United States."