Excellent work as usual floridany, thanks... most all of those patents were filed relatively recently (2013, 2014, 2015) with interesting comments under 'Status' but once approved, I believe, a patent has a 20 year shelf life (can be renewed)... new tehnology and likely been in the making for years to get to this point where now a company goes public through a reverse merger.
Best to you and all with DOLV!