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wo guo tuo la ji shou quan zhuan li zhuang kuang fen xi
Author(s): 
Pages: 74-75
Year: Issue:  7
Journal: Farm Machinery

Abstract: <正>根据国家知识产权局专利检索网提供的数据,在"拖拉机"词条下显示的近几年我国已授权各类专利的具体数据如下。2009—2012年,我国已授权各类专利分别为297项(含已公告的发明专利)、375项、398项和471项,其中国外企业在我国授权或公告的专利分别为7项、11项、10项和17项,分别占总量的2.4%、2.9%、2.5%和3.6%;国内职务
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