Patent uncertainty
Csaba Truckai invented and patented the NovaSure System ablation device with a “moisture permeable” head. He sold his company and the related patents, which eventually were purchased by Hologic. Over time, Hologic added claims to the original patent. In the meantime, Truckai went on to invent another device, the Minerva Endometrial Ablation System (MEAS), which had a “moisture impermeable” head. (Note that the “Minerva Surgical, Inc.” involved in this case is not related to the company “Minerva Industries,” which some identified as a “patent troll.”)22
Hologic sued Minerva, claiming that Truckai’s second device (MEAS) infringed on its patent for the first device (NovaSure). Truckai’s defense was that the patent on NovaSure was invalid. Hologic felt that since Truckai had obtained that patent and then sold it, it was improper for him now to claim it was invalid. There is a doctrine for that: assignor estoppel—the person who sold (assigned) the patent is prevented from later claiming it was invalid. The question in this case was whether assignor estoppel is part of the patent law of the United States. It is not in the patent statutes, so it is a court-determined part of the law.
In a 5-4 decision this Term, the Court held that assignor estoppel is recognized, but that it is narrow.23 The Court identified several exceptions to assignor estoppel, notably for this case, including the situation in which the purchaser of the patent, after the purchase, returns to the Patent and Trademark Office to expand (amend) the patent’s claims. In that case, the seller could not be estopped by the amended terms of the patent. Minerva claimed that it was attacking the expanded patent that included changes made after it sold the patent. The Court, therefore, returned the case to the Federal Circuit to apply the principles it laid out about assignor estoppel.
Biotech and other fast-moving fields frequently have new technology building on slightly earlier technology. The current patent system often leaves uncertainty about who owns which part of a valid patent. This uncertainty is a drag on innovation, and the patent system is supposed to spur innovation. Assignor estoppel is likely to create additional complexity and uncertainty in some patents, which is regrettable.
Review of the Term
In addition to the other disruptions of the Term, during the first part of the Term, Amy Coney Barrett was not yet confirmed by the Senate, so there were only 8 justices until October 27. She did not participate in those cases that were heard before she joined the Court. The consensus is that the Court heard 67 cases: 57 were formally briefed and argued along with 8 summary reversals and 2 religious cases in the Shadow Docket. In my opinion, this undercounts both the number and the importance of the Shadow Docket cases, but the following data use the 67 case convention.24
The Court was unanimous in 43% of the cases, including some of the most divisive issues. That unanimity reflects very narrow decisions. There were (by conventional count) only eight 5-4 opinions (12%), an unusually low number. Justice Kavanaugh is viewed as the “median” justice. He was in the majority in 97% of all cases. Chief Justice Roberts and Justice Barrett were in the majority 91%, and Justice Gorsuch 90%. As for the other justices, they were in the majority (all cases) most of the time: Justice Alito, 83%; Justice Thomas, 81%; Justice Breyer, 76%; Justice Kagan, 75%; and Justice Sotomayor, 69%. In “divided cases” (when unanimous cases are removed), the percentages are: Justice Kavanaugh, 95%; Chief Justice Roberts and Justice Barrett, 84%; Justice Gorsuch, 82%; Justice Alito, 70%; Justice Thomas, 66%; Justice Breyer, 58%; Justice Kagan, 55%; and Justice Sotomayor, 45%.
When the term began, many Court watchers expected a relatively uninteresting term, dealing with many technical legal details. In fact, it turned out to be more interesting and important than expected, even with narrow holdings in important cases. Part of the secret of the term was that a lot of the real action was in the Shadow Docket. The end of the term is sometimes the moment when a justice announces a plan to retire. Many commentators expected Justice Breyer might announce—he has been under pressure to do so, to allow President Biden to nominate and a Democratic Senate to confirm a progressive justice. However, he did not do so. It is possible that he will announce his retirement to be effective when his successor is confirmed, but that is pure speculation.
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