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Litigated nearly 300 IPR & CBM cases and over 40 Federal Circuit appeals

In the last 10 years, highlights of Lowenstein & Weatherwax’s practice include being identified as the top performing IPR firm in the country for the period 2013-2018 by an independent third party, representing parties in nearly 300 IPR and CBM cases before the USPTO’s Patent Trial and Appeals Board, litigating over 40 Federal Circuit appeals, and obtaining a grant of certiorari and arguing before the United States Supreme Court.


Lowenstein & Weatherwax’s attorneys include seasoned litigators who previously practiced at Irell & Manella LLP, one of the leading intellectual property litigation firms in the United States; and law professors from both UCLA and USC.

Meet our attorneys


L&W Obtains Five Noninstitutions

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Lowenstein & Weatherwax LLP attorneys have significant expertise in Inter Partes Review, and have represented companies from a variety of technological areas, including semiconductors, computer hardware and software, pharmaceutical and biotechnology. Our attorneys have successfully represented numerous large and reputable companies, obtaining and defending against claims totaling billions of dollars on their behalf.


  • Patent Post-Grant (IPR)
  • Patent Litigation
  • Appellate

Patent Post-Grant (IPR)

L&W’s attorneys have represented patent owners in nearly 300 IPRs and CBMs, garnering a strong track record of success in high stakes matters against top notch competition.

Patent Litigation

L&W can and does litigate patents in virtually any technology. Its experienced attorneys have litigated intellectual property in such technologies as semiconductor packaging and microelectronics, digital video recorders, implantable heart valve repair products, video game controllers and distribution channels, pharmaceutical drugs and drug delivery, delivery, smartphone user interfaces, electronic commerce and a multitude of others.


L&W has litigated over 40 cases before the Federal Circuit and one in the United States Supreme Court

Efficiency & Experience

L&W’s success in IPR matters has been widely recognized. In 2018, Patexia identified L&W as being the best performing law firm in IPRs out of over 1100 law firms over the 2013-2018 time period. L&W’s success is particularly notable as it is a boutique of only 11 attorneys that routinely litigates against some of the largest companies and law firms in the world.