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It's an extension of this (granted) patent which was filed in 2008: https://patents.justia.com/patent/8204437 https://patents.justia.com/patent/8204437
by mikeyouse 5y ago
It's an extension of this (granted) patent which was filed in 2008:
https://patents.justia.com/patent/8204437 https://patents.justia.com/patent/8204437