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GUELPH, ON / ACCESSWIRE / September 22, 2021 / ZEN Graphene Solutions Ltd. (“ZEN” or the “Company”) (TSXV:ZEN)(OTC PINK:ZENYF), a Canadian, nanotechnology company focused on next-gen healthcare solutions, today announces Health Canada approval of ZENGuard™ disposable face mask with biocidal coating and is rated at an ASTM Level 3.
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