With the analysis among 85 patents, we discovered top 43 key players by total patent application. Hunan Qiu Zeyou Patent Strategy Planning Co., Ltd., W.P. Hickman Co., 3M Co. are dominant in this area. They take 28.24% of the total patent filing.
Hunan Sheng, China
Patent: 15
North Carolina, United States
Patent: 5
Minnesota, United States
Patent: 4
Virginia, United States
Patent: 4
Mitsubishi Heavy Industries, Ltd.
Ohio, United States
Patent: 1
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