The document defines a trademark as a mark capable of being graphically represented that distinguishes goods or services of one person from others. It can include shapes, packaging, colors, names, devices, letters, numbers, sounds, and more. Symbols like ®, TM, and SM indicate registered, unregistered used on goods, and unregistered used for services trademarks. Examples of trademarks provided include word marks, combinations of words/numbers, devices, colors, sounds, certification marks, shapes, and taglines.