PTAB round-up: filing slumps; tribal immunity briefs filed; Oil States and SAS argued; Aqua Products guidance issued; new remand procedures outlined

November PTAB news included the lowest petition filing since January 2016, oral arguments at the Supreme Court, amicus briefing on whether tribal ownership immunises a patent from IPR challenges, guidance on motions to amend, new procedures for remands from the Federal Circuit, and an increase in fees

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