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# Patent Challenge Filings Collapse at PTAB
- URL: https://adjacent.media/signals/patent-challenge-filings-collapse-at-ptab/
- Published: 2026-11-10T17:18:02.000Z
- Updated: 2026-11-10T17:18:02.000Z
- Description: The decline in inter partes review petitions reflects a shift in litigation calculus.
- Author: Jonathan Greene
- Tags: #signal, theme-culture, regulation, policy, IP Rights

Source: [Deeplinks](https://www.eff.org/deeplinks/2026/11/why-fewer-people-are-challenging-bad-patents?ref=adjacent.media)

The decline in inter partes review petitions reflects a shift in litigation calculus. Recent Supreme Court decisions and procedural changes have made challenges riskier and costlier, prompting companies and individuals to abandon what was once a cost-effective mechanism for invalidating weak patents. Patent holders now face fewer defensive challenges, particularly in software and biotech—sectors where smaller competitors historically used IPR to compete against well-funded incumbents. The burden of defending a patent has shifted toward the challenger.