• Posts by Constantine Marantidis

    Constantine is known for his excellent client service, responsiveness, and tenacity.

    Constantine Marantidis is a partner in Lewis Roca’s Intellectual Property Practice Group. With multiple degrees in aircraft and aeronautical engineering and engineering mechanics, Constantine is ...

In a 5-4 decision written by Justice Kagan (joined by Chief Justice Roberts and Justices Breyer, Sotomayor and Kavanaugh) in Minerva Surgical, Inc. v. Hologic, Inc. (June 29, 2021), the Supreme Court reined in the doctrine of assignor estoppel.

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On November 9, 2018, in Arista Networks, Inc. v. Cisco Systems, Inc., the Federal Circuit held that assignor estoppel does not apply in inter partes review (IPR) proceedings. In this case, a former employee of Cisco Systems, Inc. (“Cisco”), who had assigned his invention as patented (U.S. Patent No. 7,340,597 – “the ‘597 patent”) to Cisco, …

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In a recent opinion [DSS Technology Management. v. Apple Inc., (Fed. Cir. 3/23/2018)], the Federal Circuit iterated that the Patent Trial and Appeal Board (“the Board”) must provide additional rationale beyond “ordinary creativity” and “common sense” for modifying a single reference for rendering a claim invalid. Reference to the “ordinary creativity” of the ordinary skilled …

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In a most recent opinion, the Federal Circuit makes it clear that unless it chooses to exercise its waiver rights under 37 CFR 42.5(b), the Patent Trial and Appeal Board (“the Board”), consistent with the PTO guidelines, is obligated to dismiss new arguments and evidence presented for the first time during the oral argument phase …

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