I think any such devices, whatever they are named, are either made by and for the original inventor who occasionally popped up on this forum and claimed to have made further and better modifications (cannot recall the product name or his pseudonym) or, as we can see GEOMC, the original Korean manufacturer, who may also have made modifications and, I believe, had a lien and lawsuit against Calmare for non-payment of that load of boxes in the warehouse. Calmare claimed money isn ot owed until sometime in the future but I am unclear how that was rationalized.
I tend to believe that changes in technology and some understanding of how this may work (if it does), would have resulted in modifications that are not incorporated in the Calmare warehouse stock. Thus, much like the share price, the value diminishes by the day or hour or minute.