This company that makes Listerine & Sudafed was actually started by 3 brothers, not just 2
In 1849 Charles Pfizer, a chemist, and Charles Erhart, a confectioner, 
began a .... By 1980 Pfizer was one of only two U.S. companies among the top 
ten .... who founded the Lambert Pharmacal Company to make and sell Listerine.