With the analysis among 157 patents, we discovered top 24 key players by total patent application. Vertex Pharmaceuticals, Inc., Aventis Pharma, Warner-Lambert Co. are dominant in this area. They take 66.24% of the total patent filing.
Massachusetts, United States
Patent: 71
New Jersey, United States
Patent: 15
New Jersey, United States
Patent: 7
Ohio, United States
Patent: 5
California, United States
Patent: 5
California, United States
Patent: 5
Missouri, United States
Patent: 4
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