从专利角度分析无缝室内外定位技术的发展态势
姜珍,陈伟航,张馥楠,余京宪,闫舒,张茹

Development Situation of Seamless Indoor and Outdoor Positioning from Patent Perspective
Zhen Jiang,Weihang Chen,Funan Zhang,Jingxian Yu,Shu Yan,Ru Zhang
图4 无缝室内外定位领域专利申请量在各目标市场国/地区的占比情况(件)