Bayer 1853—a modification of salicylic acid or salicin, a folk remedy found in the bark of the willow plant. By 1899 Bayer's trademark Aspirin was registered worldwide for Bayer's brand of acetylsalicylic acid, but it lost its trademark status in the United States, France and the United Kingdom after the confiscation of Bayer's US assets and trademarks during World War I by the United States, and because of the subsequent widespread usage of the word. The term "aspirin" continued to be used in the US, UK and France for all brands of the drug, but it is still a registered trademark
Trademark on colour, smell, or sound (like jingles). Trademarks which are considered offensive are often rejected according to a nation's trademark law. The term "trademark" is also used informally to refer to any distinguishing attribute by which an individual is readily identified, such as the well-known characteristics of celebrities. When a trademark is used in relation to services rather than products, it may sometimes be called a service mark, particularly in the United States. The essential function of a trademark is to exclusively identify the commercial source or origin of products or services, so a trademark, properly called, "indicates source" or