is there anybody out there?, page-20

Yes the tech could always change, but the Patent in 2018 already showed that the filter can destroy ozone, so it's not new. I suggest people read that before the post, at lease then they can argue a point that they patented tech that doesn't work because they are smarter than the people that invented this "Unique" technology. I'm not sure why someone spends so much time trying to disprove something rather than looking elsewhere to invest. Mostly he has been likely buying whilst the trying to scare off the weak hands.