Earliest use should provide the earliest sales invoice or contract for the goods or services using the trademark or the earliest advertisement or copy of the trademark registration certificate

The duration of use of the trademark< /p>

The main way for trademark rights holders to utilize and exercise their trademark exclusive rights is to use their trademarks. Regardless of whether a trademark is registered or not, only by using it can its value be reflected in transactions and the intangible property rights of the trademark be transformed into material wealth. For unregistered trademarks, only continuous use can reflect the existence of the trademark, and it is possible to generate distinctiveness through use, thereby creating visibility among the relevant public. Otherwise, the public will have no way of understanding the trademark, let alone becoming well-known. For registered trademark rights holders, using the trademark is their obligation. Therefore, it is also very necessary to consider the duration of trademark use as a factor in determining a well-known trademark. According to the provisions of Article 3, Item 2 of the Provisions on the Recognition and Protection of Well-known Trademarks, relevant materials proving the duration of use of the trademark include relevant materials regarding the history and scope of use and registration of the trademark.