With the analysis among 256 patents, we discovered top 36 key players by total patent application. Schering AG, The Upjohn Co., Merck & Co., Inc. are dominant in this area. They take 42.97% of the total patent filing.
Berlin, Germany
Patent: 41
Michigan, United States
Patent: 35
New Jersey, United States
Patent: 34
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Patent: 10
New Jersey, United States
Patent: 7
Noord-Holland, Netherlands
Patent: 6
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