With the analysis among 36,881 patents, we discovered top 465 key players by total patent application. Toyota Motor Corp., Hitachi Ltd., Robert Bosch GmbH are dominant in this area. They take 2.10% of the total patent filing.
With the analysis among related 20,211 patents applied in the last 5 years. We discover 500 most active companies in this area. The fast-growing Gree Electric Appliances, Inc. of Zhuhai, State Grid Corp. of China, Northwestern Polytechnical University take 0.74% of patent filing during this period.
With the analysis among related 20,211 patents in last 5 years, we discover 160 new entrants. Guangzhou Hualing Refrigeration Equipment Co., Ltd., Seamach Ltd., KLA-Tencor Technologies Corp. are the most active new entrants in this area.
With the analysis among 7,206 patents, we discovered top 394 universities and scientific research institutions by total patent application. Hohai University, Zhejiang University, South China University of Technology are dominant in this area. They take 3.46% of the total patent filing.