assignmentassignment: the transfer of legal or beneficial ownership of...: the transfer of legal or beneficial ownership of a right or interest from one party to another (for example, the right to sue under a contract or the assignmentassignment: the transfer of legal or beneficial ownership of... of intellectual propertyintellectual property: a piece of work or a creation by th... rights). Subject to the nature of the right or interest being assigned, the assignmentassignment: the transfer of legal or beneficial ownership of... may have to satisfy certain requirements in order to be valid. For example, the Trade Marks Act 1994 requires the valid assignmentassignment: the transfer of legal or beneficial ownership of... of a registered trade marktrade mark: a symbol, most commonly used in conjunction with... to be recorded in writing.