Chemical compound and secondary patents for drugs in sample.
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Legend: Based on the 432 new molecular entities (with at least one patent) approved by the U.S. Food and Drug Administration between 1985 and 2005. Categories are based on authors' coding of the claims in the 1304 patents (1261 distinct patents) associated with these drugs. “Independent” secondary patents are those that do not have chemical compound claims.
创建时间：
2015-12-02
