Which ancient civilization is credited with creating the first known branded products, using distinctive pottery marks that functioned similar to modern trademarks?

Before modern retail, ancient civilizations had sophisticated commercial systems with recognizable brands and marketing techniques. Merchants in ancient Rome, Egypt, Greece, and Mesopotamia developed ways to distinguish their products through symbols, reputation, and customer loyalty. This poll explores how ancient sellers promoted their wares, built customer trust, and established what we might consider the earliest forms of brand identity and marketing strategy in history's first marketplaces.

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Ancient Egyptians (using royal cartouches to denote products made for the pharaoh)
Ancient Greeks (using potter's marks to indicate workshop origin on amphorae and ceramics)
Mesopotamians (using cylinder seals to authenticate goods from specific merchants)
Ancient Romans (using 'ex officina' stamps on goods to indicate authorized manufacturers)