With the analysis among 2,164 patents, we discovered top 459 key players by total patent application. Shimizu Corp., Kajima Corp., Ohbayashi Corp. are dominant in this area. They take 10.86% of the total patent filing.
Tokyo-to, Japan
Patent: 105
Jiangsu Sheng, China
Patent: 69
Jiangsu Sheng, China
Patent: 61
Chiba-ken, Japan
Patent: 57
Tokyo-to, Japan
Patent: 46
Tokyo-to, Japan
Patent: 45
Osaka-fu, Japan
Patent: 36
Jiangsu Sheng, China
Patent: 33
Mitsubishi Heavy Industries, Ltd.
Tokyo-to, Japan
Patent: 28
Sichuan Sheng, China
Patent: 24
With the analysis among 3 patents, we discovered top 2 start-ups by total patent application.
Massachusetts, United States
Patent: 1
With the analysis among related 458 patents applied in the last 5 years. We discover 314 most active companies in this area. The fast-growing China Petroleum & Chemical Corp., Nanjing Normal University, Zhongshui North Survey, Design and Research Co., Ltd. take 5.02% of patent filing during this period.
Beijing Shi, China
Patent: 8
Jiangsu Sheng, China
Patent: 8
Tianjin Shi, China
Patent: 7
Beijing Shi, China
Patent: 7
Zhejiang Sheng, China
Patent: 6
Guizhou Sheng, China
Patent: 6
Sichuan Sheng, China
Patent: 6
Hunan Sheng, China
Patent: 5
Sichuan Sheng, China
Patent: 5
China University of Mining & Technology (Beijing)
Beijing Shi, China
Patent: 5
With the analysis among related 458 patents in last 5 years, we discover 228 new entrants. Zhongshui North Survey, Design and Research Co., Ltd., China Railway Tunnel Bureau Group Co., Ltd., State Key Laboratory of Shield Tunneling and Tunneling Technology are the most active new entrants in this area.
Tianjin Shi, China
Patent: 7
Guangdong Sheng, China
Patent: 5
undefined undefined
Patent: 4
Guangdong Sheng, China
Patent: 4
Beijing Shi, China
Patent: 4
Beijing Shi, China
Patent: 4
Shandong Sheng, China
Patent: 3
Jiangsu Crescent Mining Technology Development Co., Ltd.
Jiangsu Sheng, China
Patent: 3
Beijing Shi, China
Patent: 3
Beijing Shi, China
Patent: 3
With the analysis among 462 patents, we discovered top 89 universities and scientific research institutions by total patent application. China University of Mining & Technology, Railway Technical Research Institute, China University of Mining & Technology (Beijing) are dominant in this area. They take 9.09% of the total patent filing.
Jiangsu Sheng, China
Patent: 17
China University of Mining & Technology (Beijing)
Beijing Shi, China
Patent: 11
Jiangsu Sheng, China
Patent: 10
Shaanxi Sheng, China
Patent: 10
Hubei Sheng, China
Patent: 9
Jiangsu Sheng, China
Patent: 8
Hunan Sheng, China
Patent: 7
Anhui Sheng, China
Patent: 7
Sichuan Sheng, China
Patent: 7