专利权人以书面声明放弃其专利权的。

Where the patentee abandons his or its patent right by a written declaration.

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目前国内的二维码市场基本上被QR码占据，但QR码专利既没有在国内申请，也没有放弃专利权；

At present, the two-dimensional code of domestic market is basically occupied QR code QR code, but neither in the domestic patent application, and did not give up the patent;

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对2008年四月30日是后来的这专利权的期限部分已经被放弃。

The portion of the term of this patent subsequent to April 30, 2008 has been disclaimed.

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