With the analysis among 270 patents, we discovered top 52 key players by total patent application. Ricoh Co., Ltd., Xerox, Exxon Research & Engineering Co. are dominant in this area. They take 38.89% of the total patent filing.
Tokyo-to, Japan
Patent: 41
Connecticut, United States
Patent: 40
Exxon Research & Engineering Co.
Connecticut, United States
Patent: 15
Texas, United States
Patent: 11
Pennsylvania, United States
Patent: 6
California, United States
Patent: 6
Minnesota, United States
Patent: 5
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With the analysis among 4 patents, we discovered top 2 universities and scientific research institutions by total patent application.
Railway Technical Research Institute
Shaanxi Sheng, China
Patent: 1