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ZEN Graphene Solutions Announces Exclusive Worldwide Rights to Commercialize Rapid, Saliva-Based COVID-19 Antigen Testing Technology

GUELPH, ON / ACCESSWIRE / June 17, 2021 / ZEN Graphene Solutions Ltd. ("ZEN" or the "Company") (TSXV:ZEN)(OTC:ZENYF), a Canadian, next-gen nanomaterials technology company, is pleased to announce that it has signed an exclusive agreement with McMaster Un