It estimates that the millions of copyright-free works in its database will be labeled with the Public Domain Mark by the middle of next year.
据估算，图书馆数据库中数百万无版权限制的作品，将在明年年中之前打上公有领域标志的烙印。
2
PATENTS, trade MARKS, ETC. : the Sellers shall be held free from any dispute regarding the infringements of patent, design, trade mark or copyright of the goods contracted for.
专利、商标等：卖方应免受有关侵犯合约所定货物的专利、设计、商标或版权等纠纷的干扰。
3
Digital watermark is invisible mark embedded in digital image, video or audio documents, by detecting the information of watermarking to protect copyright of multimedia data.