With the analysis among 33 patents, we discovered top 37 key players by total patent application. Hitachi Ltd., NIPPON STEEL CORP., Mahle Tri-Ring Valve Train (Hubei) Co. Ltd. are dominant in this area. They take 18.18% of the total patent filing.
Hubei Sheng, China
Patent: 2
Mitsubishi Heavy Industries, Ltd.
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With the analysis among 3 patents, we discovered top 2 universities and scientific research institutions by total patent application.
Zhejiang Sheng, China
Patent: 1
Beijing Shi, China
Patent: 1