Site: www.ztb.im
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C-Patex exchange was beta launched in November 2017. Following that, “Cripto Patagonia” was registered as a trade mark in Argentina. 
Trade By Trade is a centralized cryptocurrency exchange operated by Trade By Trade Ltd., Vanutau. This digital exchange platform provides USDT and BTC markets.
Being relatively new, Safe Currency is a UK-based broker that launched in 2018 and offers its exchange services worldwide.