With the analysis among 64 patents, we discovered top 19 key players by total patent application. Purdue Neuroscience Co., Aventis Pharma SARL, Fisons Corp. are dominant in this area. They take 43.75% of the total patent filing.
Connecticut, United States
Patent: 11
New Jersey, United States
Patent: 8
AstraZeneca Pharmaceutical Co., Ltd.
Jiangsu Sheng, China
Patent: 8
Aventis Pharmaceuticals, Inc.
New Jersey, United States
Patent: 6
Newron Pharmaceuticals SpA
Lombardia, Italy
Patent: 4
Pennsylvania, United States
Patent: 4
Astra Pharmaceuticals Ltd.
Cambridgeshire, United Kingdom
Patent: 3
Luxembourg, Luxembourg
Patent: 2
Delaware, United States
Patent: 2
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