>The problem I can see is that the filing date for those patents is far later than public demonstrations such as the one at D9 on or around 04/22/2012
That would indeed cause a problem in a country with an "absolute novelty" requirement in patent applications, but the United States is not a such a country. In the US, the inventor has 12 months after the first public demonstration to file for a patent, and in this case, the patent was filed within 12 months.
http://patents.justia.com/inventor/marc-berte http://patents.justia.com/inventor/matthew-angle
The problem I can see is that the filing date for those patents is far later than public demonstrations such as the one at D9 on or around 04/22/2012