On July 31, 2017, the USPTO filed a supplemental brief with the Federal Circuit arguing that there is no Article III requirement of standing for the USPTO to intervene in an appeal of the Board's decision. Knowles Elec. LLC v. Matal, Fed. Cir., No. 2016-1954, 7/31/2017. According to the PTO, there is a controversy between the appellant and the PTO, the entity that took the decision to cancel previously patented claims, and the government's decision to intervene to pursue relief on behalf of the public.
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