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Full-Text Articles in Law
Prior Art In The District Court, Stephen Yelderman
Prior Art In The District Court, Stephen Yelderman
Journal Articles
This article is an empirical study of the evidence district courts rely upon when invalidating patents. To construct our dataset, we collected every district court ruling, verdict form, and opinion (whether reported or unreported) invalidating a patent claim over a six-and-a-half-year period. We then coded individual invalidation events based on the prior art supporting the court’s analysis. In the end, we observed 3,320 invalidation events based on 817 distinct prior art references.
The nature of the prior art relied upon to invalidate patents informs the value of district court litigation as an error correction tool. The public interest in revoking …
Specialized Trial Courts In Patent Litigation: A Review Of The Patent Pilot Program's Impact On Appellate Reversal Rates At The Five-Year Mark, Amy Semet
Journal Articles
Do specialized trial court judges make more accurate decisions in patent law cases? In 2011, Congress passed a law setting up a ten-year patent law pilot program to enhance expertise in patent litigation by funneling more trial court decisions to fourteen selected district courts. Now that the five-year mark has passed, has the program had its intended effect of increasing accuracy, as measured by less reversal by the appellate court? In this Article, I analyze over 20,000 trial-court patent cases filed from late 2011 to 2016, focusing specifically on whether cases heard by district court judges participating in the patent …
Prior Art In Inter Partes Review, Stephen Yelderman
Prior Art In Inter Partes Review, Stephen Yelderman
Journal Articles
This Essay is an empirical study of the evidence the Patent Trial and Appeal Board relies upon when cancelling patents in inter partes review. To construct our dataset, we collected every final written decision invalidating a patent claim over a twelve-month period. We coded individual invalidation events on a reference-by-reference, claim-by-claim basis. Drawing on this dataset, we report a number of details about the prior art supporting patent cancellation, including the frequency with which U.S. patents, foreign patents, and printed publications were cited, the frequency with which the invalidating prior art would have been amenable to a pre-filing prior art …