Who Patented Heroin?
Who Patented Heroin? Both aspirin and heroin were created in a 2-week period in 1897 by German chemist Felix Hoffmann, who worked at Bayer. Who invented aspirin? In 1897, Felix Hoffman, a German chemist working for the Bayer company, was able to modify salicylic acid to create acetylsalicylic acid, which was named aspirin (Fig. 1).