Publications

2017
Working Paper

Patent Trolls and Small Business Employment

By: Ian Appel, Joan Farre-Mensa and Elena Simintzi

We analyze how frivolous patent-infringement claims made by “patent trolls” affect small firms’ ability to create jobs, raise capital, and survive. Our identification strategy exploits the staggered passage of anti-patent-troll laws at the state level. We find that the... View Details

Keywords: Patent Trolls; Patents; Small Business; Employment; Venture Capital

SSRN

February 2018
Background Note

Patent Trolling

By: Lauren H. Cohen, Umit G. Gurun, Scott Duke Kominers and George Hou

The U.S. Intellectual Property (IP) Ecosystem is one of the most robust and dynamic in the world—and has been for centuries. The bedrock of this system is the "patent," a legal document that allows its holder exclusive commercialization rights of a part of the "idea... View Details

Keywords: Intellectual Property; Patents; Lawsuits and Litigation; United States

Educators

29 Aug 2014
Working Paper Summaries

Keywords: by Lauren Cohen, Umit G. Gurun & Scott Duke Kominers

20 Aug 2014
Research & Ideas

Dragging Patent Trolls Into the Light

future. A Lucrative Business Patent trolling can be a lucrative undertaking because of the ambiguous nature of intellectual property. "A patent View Details

Keywords: by Michael Blanding; Legal Services

28 Feb 2017
Working Paper Summaries

Patent Trolls and Small-Business Employment

Keywords: by Ian Appel, Joan Farre-Mensa, and Elena Simintzi

January 2019 (Revised May 2019)
Case

When Trolls Attack: Carbonite vs. Oasis Research

By: Lauren H. Cohen, Umit G. Gurun, Scott Duke Kominers and Sarah Mehta

This case, set in October 2017, follows Danielle Sheer, general counsel for Carbonite, as she defends the company against claims of patent infringement. It provides a broad overview of the U.S. patent system and explores the impact that non-practicing entities... View Details

Keywords: Patent Infringement Litigation; Non-practicing Entities; Patent Trolls; Innovation and Invention; Intellectual Property; Patents; Laws and Statutes; Lawsuits and Litigation; Legal Liability; Computer Industry; Technology Industry; Boston

Educators

December 2019
Article

Patent Trolls: Evidence from Targeted Firms

By: Lauren Cohen, Umit Gurun and Scott Duke Kominers

We provide the first large-sample evidence on the behavior and impact of nonpracticing entities (NPEs) in the intellectual-property space. We find that, on average, NPEs appear to behave as opportunistic “patent trolls.” NPEs sue cash-rich firms and target cash in... View Details

Keywords: Patent Trolls; Innovation; Patents; Lawsuits and Litigation; Ethics; Innovation and Invention

SSRN

Article

"Troll" Check? A Proposal for Administrative Review of Patent Litigation

By: Lauren Cohen, John Golden, Umit Gurun and Scott Duke Kominers

The patent system is commonly justified as a way to promote social welfare and, more specifically, technological progress. For years, however, there has been concern that patent litigation is undermining, rather than furthering, these goals. Particularly in the United... View Details

Keywords: Patent Trolls; Patents; Lawsuits and Litigation

2023
Other Article

The Harvard USPTO Patent Dataset: A Large-Scale, Well-Structured, and Multi-Purpose Corpus of Patent Applications

By: Mirac Suzgun, Luke Melas-Kyriazi, Suproteem K. Sarkar, Scott Duke Kominers and Stuart Shieber

Innovation is a major driver of economic and social development, and information about many kinds of innovation is embedded in semi-structured data from patents and patent applications. Though the impact and novelty of innovations expressed in patent data are difficult... View Details

Keywords: USPTO; Natural Language Processing; Classification; Summarization; Patent Novelty; Patent Trolls; Patent Enforceability; Patents; Innovation and Invention; Intellectual Property; AI and Machine Learning; Analytics and Data Science

2017
Chapter

Empirical Evidence on the Behavior and Impact of Patent Trolls: A Survey

By: Lauren Cohen, Umit Gurun and Scott Duke Kominers

We survey the empirical literature on non-practicing entity (NPE) litigation behavior and its consequences. We document both aggregate trends and cross-sectional differences amongst various types of NPEs. Survey evidence illustrates a number of ways in which NPEs can... View Details

Keywords: Patent Trolls; NPEs; PAEs; Innovation; Patents; Lawsuits and Litigation; Innovation and Invention

2018
Working Paper

Patent Trolls: Evidence from Targeted Firms

By: Lauren Cohen, Umit G. Gurun and Scott Duke Kominers

We provide the first large-sample evidence on the behavior and impact of non-practicing entities (NPEs) in the intellectual property space. We find that on average, NPEs appear to behave as opportunistic “patent trolls.” NPEs sue cash-rich firms—and target cash in... View Details

Keywords: Patent Trolls; NPEs; PAEs; Innovation; Patents; Ethics; Lawsuits and Litigation; Innovation and Invention; Corporate Finance

2016
Working Paper

Patent Trolls and Small Business Employment

By: Joan Farre-Mensa, Ian Appel and Elena Simintzi

SSRN

Article

Patent Trolling Isn't Dead—It's Just Moving to Delaware

By: Lauren Cohen, Umit G. Gurun and Scott Duke Kominers

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Article

Congress Must Look Forward in Reining in Patent Trolls

By: Lauren Cohen, Umit G. Gurun and Scott Duke Kominers