什么是DAU？菲律宾商标申请必须提交DAU吗？
DAU的全称为“Declaration of Actual Use”---实际使用宣誓（俗话说就是你要申明一下在菲律宾的商标已经使用了）。菲律宾商标必须提交DAU，没有按时提交DAU的注册商标会无效，且没有机会复活。
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