With the analysis among 9,542 patents, we discovered top 462 key players by total patent application. Coal Industry (Patents) Ltd., Caterpillar, Inc., Oiles Corp. are dominant in this area. They take 1.32% of the total patent filing.
With the analysis among related 2,395 patents applied in the last 5 years. We discover 389 most active companies in this area. The fast-growing Wavepiston A/S, Noble Drilling Services LLC, State Grid Corp. of China take 0.96% of patent filing during this period.
With the analysis among related 2,395 patents in last 5 years, we discover 318 new entrants. Wavepiston A/S, Noble Drilling Services LLC, Lonking Shanghai Precision Hydraulic Components Co. Ltd. are the most active new entrants in this area.
With the analysis among 410 patents, we discovered top 108 universities and scientific research institutions by total patent application. Zhejiang University, Changsha University of Science & Technology, Anhui Science & Technology University are dominant in this area. They take 5.12% of the total patent filing.