Patent litigation attorney
Justin T. Nemunaitis
15 tracked appearances — 10 plaintiff · 5 defendant.
Specialty & background
Justin T. Nemunaitis is a Principal at Caldwell Cassady & Curry, focusing his practice on patent infringement disputes and complex commercial litigation. While representing both plaintiffs and defendants, his tracked cases show a strong emphasis on plaintiff-side representation, with 10 plaintiff appearances against 5 defendant appearances. Before joining Caldwell Cassady & Curry, Mr. Nemunaitis practiced at McKool Smith.
His patent litigation work spans a range of technologies, notably environmental control systems, particularly for mercury emissions capture in coal-fired power plants, and water purification technologies, including those for PFAS/PFOS removal. This focus is evident through his consistent representation of Midwest Energy Emissions Corp. (now Birchtech Corp.) in numerous infringement suits. Beyond environmental technologies, Mr. Nemunaitis has experience with digital content distribution and protection, fiber optic networking, wireless communications standards (including physical layer RF signaling, ARQ protocols, and digital video compression algorithms), and oilfield services patents, such as those related to hydraulic fracturing tools.
Mr. Nemunaitis has contributed to significant trial outcomes. He was part of the trial team that secured a $57 million patent infringement verdict for Midwest Energy Emissions Corp. against CERT defendants in March 2024, which was later increased to a $78.4 million judgment for willful infringement and recognized among the Top 100 Verdicts of 2024. He also played a key role in the Collision Communications Inc. team that won a $445.5 million patent infringement verdict against Samsung Electronics Co. Ltd. in October 2025 concerning wireless communication technology. His firm's website further notes his involvement in obtaining a $532.9 million verdict for Smartflash and favorable defense resolutions for clients like Halliburton.
He possesses experience with post-grant proceedings, having assisted Smartflash in defending its patents against numerous invalidation attempts before the Patent Trial and Appeal Board (PTAB). Additionally, his representation of Birchtech Corp. (formerly Midwest Energy Emissions Corp.) has involved defending against Inter Partes Review (IPR) challenges at the PTAB. Mr. Nemunaitis is admitted to practice in Texas State Courts, the U.S. District Courts for the Northern and Eastern Districts of Texas, and the U.S. Court of Appeals for the Federal Circuit. He earned his J.D. from the Illinois Institute of Technology, Chicago-Kent College of Law in 2008, where he served as Senior Editor of Law Review and Executive Editor of Seventh Circuit Review, and holds a B.S. in Mathematics from the University of Texas at Austin (2005).
Firms
Roles
- Lead Counsel4
- lead counsel2
- counsel1
- principal counsel1
- Backup Counsel1
- Counsel1
- Counsel of record1
- Principal Counsel1
- Principal1
- back-up counsel1
- Principal, trial team1
Cases (15)
- Δ defendantBerkshire Hathaway Energy Company v. Birchtech Corp. f/k/a Midwest Energy Emissions Corp.Caldwell Cassady & Curry · Principal Counsel
- Δ defendantCERT Operations II LLC et al. v. Birchtech Corp.Caldwell Cassady & Curry · principal counsel
- π plaintiffMidwest Energy Emissions Corp. et al. v. Ameren Corp. et al.Caldwell Cassady & Curry · lead counsel
- π plaintiffMidwest Energy Emissions Corp. et al. v. Arthur J. Gallagher & Co. et al.Caldwell Cassady & Curry · Principal
- π plaintiffMidwest Energy Emissions Corp. et al. v. CERT Operations II LLC et al.Caldwell Cassady & Curry · counsel
- π plaintiffMidwest Energy Emissions Corp. et al. v. Evergy Kansas Central, Inc.Caldwell Cassady & Curry · Lead Counsel
- π plaintiffMidwest Energy Emissions Corp. et al. v. Evergy, Inc. et al.Caldwell, Cassady & Curry · back-up counsel
- π plaintiffMidwest Energy Emissions Corp. et al. v. Tucson Electric Power Co. et al.Caldwell Cassady & Curry · Lead Counsel
- π plaintiffMidwest Energy Emissions Corp. v. Ameren CorporationCaldwell Cassady & Curry · Lead Counsel
- π plaintiffMidwest Energy Emissions Corp. v. Arthur J. Gallagher & Co.Caldwell Cassady Curry · lead counsel
- π plaintiffMidwest Energy Emissions Corp. v. Tucson Electric Power CompanyCaldwell Cassady Curry · Lead Counsel
- Δ defendantPacificorp et al v. Birchtech Corp.Caldwell Cassady & Curry · Counsel
- Δ defendantUnified Patents Inc. v. Birchtech Corp. f/k/a Midwest Energy Emissions Corp.Caldwell Cassady & Curry · Counsel of record
- Δ defendantUnknown Petitioner v. Birchtech Corp.Caldwell Cassady & Curry · Backup Counsel
- π plaintiffUntitled caseCaldwell Cassady & Curry · Principal, trial team