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【多选题】
在我国,专利权终止的原因主要有( )A.
专利权期限届
B.
专利权人没有按照规定缴纳年费
C.
专利权人以书面声明放弃其专利权
D.
专利权无人继承
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A.
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B.
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A.
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B.
And you
C.
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