You or anyone can do your own DD . Graphite and Graphene applications are well known for folks that are into Materials for production, batteries, nuclear, steel, Auto Industry and many more. It is part of the Carbon Family so it is Strong and Light in basic terms.
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here are some of the bigger ones. In the Case of BIEI , it is one of a few if not any in OTC Land to be into this , very interesting and has the contract in place also.
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Ahead of the curve in OTC World, it appears.
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Applied Graphene Materials (AGM)
Cabot Corporation (CBT)
Haydale Graphene Industries (HAYD)
AIXTRON (AIXA)
ZEN Graphene Solutions (ZEN)
Market Data 
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