This person holds a number of similar patents from the looks of it: https://www.google.com/patents/US8434019 https://www.google.com/patents/US8434019 https://

This person holds a number of similar patents from the looks of it: https://www.google.com/patents/US8434019 https://www.google.com/patents/US8434019 https://www.google.com/search?q="Daniel+Paul+Nelson" https://www.google.com/search?q="Daniel+Paul+Nelson"