A more thorough explanation:

Definition: An infringer is a person who interferes with one of the exclusive rights of a patent, copyright, or trademark owner. This means they are using or copying someone else's work without permission.

Examples:

• A company that uses a logo that is very similar to another company's logo, causing confusion for customers, is an infringer of the trademark.
• A person who copies and distributes a song without permission from the artist is an infringer of the copyright.
• A manufacturer who produces a product that is covered by someone else's patent without permission is an infringer of the patent.

These examples illustrate how an infringer is someone who is using or copying someone else's work without permission, which is a violation of intellectual property rights.