What are the words, names, symbols, or devices that indicate the source of goods or services in commerce called?

The correct answer is trademark because a trademark specifically refers to distinctive signs, logos, words, names, symbols, or devices that are legally registered or established by a company to identify and differentiate its goods or services from those of others. Trademarks serve to protect the branding of a product or service, ensuring that consumers can recognize the source of the product and associate it with a particular quality or reputation.

While a brand can be closely related to trademark, it often encompasses a broader concept that includes the overall perception and emotional connection consumers have with a company or its products. A patent protects inventions, and copyright protects original works of authorship; neither of these terms apply to the identification and source of goods in commerce as specifically as a trademark does.