With the analysis among 59 patents, we discovered top 19 key players by total patent application. Bayer AG, Dorr-Oliver, Inc., Union Carbide Corp. are dominant in this area. They take 50.85% of the total patent filing.
Nordrhein-Westfalen, Germany
Patent: 23
Pennsylvania, United States
Patent: 4
Wisconsin, United States
Patent: 3
Delaware, United States
Patent: 2
Ohio, United States
Patent: 1
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