A pharmaceutical patent can be particularly valuable. Pharma companies developing new drugs obtain patents to protect their investments.This article analyzes the effect of trademark and trade dress law on prescription drug prices and recommends both regulatory and judicial approaches. Find out what filing firms are, why some are scams, and how we're working toward stopping filing firm scams. Part Three will discuss the differences. Professional headshot of Zaneta Robinson. Home page of the United States Patent and Trademark Office's main web site.