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万方数据知识服务平台-中外专利
Title:
万方数据知识服务平台-中外专利
Type:
专利
Description:
专利是全文资源。收录了国内外的发明、实用新型及外观设计等专利2400余万项，其中中国专利331万余项，外国专利2073万余项。内容涉及自然科学各个学科领域，每年增加约25万条，每两周更新一次。
Publisher:
万方数据股份有限公司
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