With the analysis among 59 patents, we discovered top 20 key players by total patent application. E. Merck KG, Syntex SA, Schering AG are dominant in this area. They take 49.15% of the total patent filing.
Hessen, Germany
Patent: 16
Buenos Aires, Argentina
Patent: 8
Hertfordshire, United Kingdom
Patent: 2
Minnesota, United States
Patent: 1
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