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
Powerchina Chengdu Engineering Corp. Ltd.
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.
China Petroleum & Chemical Corp.
Beijing Shi, China
Patent: 8
Nanjing Normal University
Jiangsu Sheng, China
Patent: 8
Zhongshui North Survey, Design and Research Co., Ltd.
Tianjin Shi, China
Patent: 7
Beijing Shi, China
Patent: 7
Powerchina Huadong Engineering Corp. Ltd.
Zhejiang Sheng, China
Patent: 6
Powerchina Guiyang Engineering Corp. Ltd.
Guizhou Sheng, China
Patent: 6
China Railway Eryuan Engineering Group Co., Ltd.
Sichuan Sheng, China
Patent: 6
Hunan Sheng, China
Patent: 5
Powerchina Chengdu Engineering Corp. Ltd.
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.
Zhongshui North Survey, Design and Research Co., Ltd.
Tianjin Shi, China
Patent: 7
China Railway Tunnel Bureau Group Co., Ltd.
Guangdong Sheng, China
Patent: 5
State Key Laboratory of Shield Tunneling and Tunneling Technology
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Patent: 4
The First Construction Co., Ltd. of China Fourth Construction
Guangdong Sheng, China
Patent: 4
SINOPEC Research Institute of Petroleum Engineering
Beijing Shi, China
Patent: 4
China University of Geosciences
Beijing Shi, China
Patent: 4
Shandong Sheng, China
Patent: 3
Jiangsu Crescent Mining Technology Development Co., Ltd.
Jiangsu Sheng, China
Patent: 3
China Energy Investment Corp., Ltd.
Beijing Shi, China
Patent: 3
National Institute of Clean & Low Carbon Energy
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.
China University of Mining & Technology
Jiangsu Sheng, China
Patent: 17
Railway Technical Research Institute
China University of Mining & Technology (Beijing)
Beijing Shi, China
Patent: 11
Nanjing Normal University
Jiangsu Sheng, China
Patent: 10
Xi'an University of Science & Technology
Shaanxi Sheng, China
Patent: 10
China University of Geosciences Beijing
Hubei Sheng, China
Patent: 9
Jiangsu Sheng, China
Patent: 8
Hunan Sheng, China
Patent: 7
Anhui University of Science & Technology
Anhui Sheng, China
Patent: 7
Southwest Petroleum University
Sichuan Sheng, China
Patent: 7