The device (supposedly) sold by PGYC wasn't the same as the dPollution thing, though I'm sure it was in some way similar. And equally scammy. The assignees ("inventors") were Gilles Monette and Robert Boivin.
The dPollution (Start Scientific) device is patented in the US and Canada:
I would like to Thank the board moderator and author of part I and part 2 on the background of Great Wall , $ GWBU . OOPS almost forgot to mention his / her name ...NODUMMY . JUST AN EXCELLENT DD JOB . I tip my hat . Sincerely , # 33.