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These are the patents for those interested in the tech behind this [1 − 3]. 1. http://www.google.com/patents/US8469550 http://www.google.com/patents/US8469550
by danieltillett 11y ago
These are the patents for those interested in the tech behind this [1 − 3].
1. http://www.google.com/patents/US8469550 http://www.google.com/patents/US8469550
2. https://www.google.com/patents/US20140133125 https://www.google.com/patents/US20140133125
3. http://patents.justia.com/patent/20150330607 http://patents.justia.com/patent/20150330607