使用当前分类查找授权专利和公开专利申请数据库，并阅读全文专利以及公开专利申请文件；
Search the Issued Patents and the Published Applications databases by "Current US Classification" and access full-text patents and published applications.
文章对中国国家知识产权局（SIPO）专利数据库中海洋能专利授权情况进行了分类统计。
Wherefore, ocean energy conversion patents in State Intellectual Property Office of P. R. China(SIPO) are searched and sorted.
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