Which innovation in Mesopotamian cylinder seals around 3500 BCE significantly enhanced their function as ancient 'brand identities' for merchants and officials?

In the cradle of civilization, ancient Mesopotamians developed sophisticated systems to mark ownership and authenticate goods - essentially creating the world's first brand identities. Cylinder seals and stamp seals served as unique identifiers for merchants, royalty, and temples, functioning much like modern logos and trademarks. These small but powerful objects communicated authority, quality, and origin across vast trade networks spanning multiple cultures and languages. Test your knowledge about these ancient branding tools that helped build the first complex economies!

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The addition of cuneiform inscriptions that specified the owner's name and title
The use of precious metals like gold and silver instead of stone
The introduction of pictorial scenes showing the goods being traded
The standardization of seal sizes to create uniform impressions across the empire