Since the Patent Trial and Appeal Board (PTAB) was created in 2012, it has become a valuable source of work for US law firms. The popularity of its offering — the first quarter of this year saw the most inter partes reviews (IPRs) filed on record — has provided a boost to many IP practices just as patent litigation in district courts has gone into an 18-month slump. Last year in a sign of how PTAB groups have become an established part of IP practices, a PTAB Bar Association was launched and earlier this year held its first annual conference to a packed house.

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