With the analysis among 58 patents, we discovered top 21 key players by total patent application. EIDP, Inc., IG Farbenindustrie AG, English Electric Ltd. are dominant in this area. They take 25.86% of the total patent filing.
Delaware, United States
Patent: 5
Tennessee, United States
Patent: 4
Noord-Holland, Netherlands
Patent: 2
Massachusetts, United States
Patent: 1
Pennsylvania, United States
Patent: 1
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