What you say is true, however, SFIO....
does own patent # 08738110.9 (at least no one has presented any evidence to the contrary) and patent # 08738110.9 predates, i.e. represents "prior art", for all of the others. I believe that means the others are virtually worthless without access in some form to the SFIO patent if that technology is incorporated into the product, but I am waiting for a patent attorney to confirm or clarify that.