An Iowa store chain is suing Subway restaurants for the international chain's claimed exclusive rights to using the word "footlong" in promoting sandwiches.
But notice also the end of the ad (after several column inches of claims and testimonials):
That's right...they took their name "Pain Killer" so seriously that the end of every advertisment warned other medicine makers of legal action for appropriating the name.
Second, this is also the reason why I am so fascinated by 19th-century patent medicines! The subject cuts across so many other areas: medicine, advertising, collecting, popular culture, philately, biography, invention, revenue, and the law! (and much more!)