With the analysis among 23 patents, we discovered top 23 key players by total patent application. Hitachi Zosen Corp., Hitachi Ltd., Isuzu Motors Ltd. are dominant in this area. They take 21.74% of the total patent filing.
Baden-Württemberg, Germany
Patent: 1
Taiwan Province, China
Patent: 1
Guangdong Sheng, China
Patent: 1
Sichuan Sheng, China
Patent: 1
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