Benk - It hasn't only been Zenex - There is Crothall using Tru-D SmartUVC. A hospital in Oklohoma using Steril-Aire UVC Lights
As far as not hearing about competitors - most companies keep their product development under tight wraps until they are ready. Medizone didn't have that option because this is all they have and needed to attract investment dollars. If J&J was developing something I don't think we would know about it until it is market-ready.
Having said all that I added to my position several weeks ago - unfortunately, considering todays sp, several weeks too early.
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