Partner
Daniel Cooley, leader of Finnegan’s mechanical practice group, helps companies protect, leverage, and defend their intellectual property. He handles litigation at both the trial and appellate level. Dan has served as lead counsel in proceedings in U.S. district courts, Section 337 investigations at the U.S. International Trade Commission (ITC), post-grant proceedings at the Patent Trial and Appeal Board (PTAB), and appeals to the U.S. Court of Appeals for the Federal Circuit.
Dan handles all aspects of litigation, including pre-suit diligence, case strategy, discovery, depositions, dispositive and non-dispositive motion practice, trial, and appeal. He served as a law clerk to the Honorable S. Jay Plager at the U.S. Court of Appeals for the Federal Circuit, and has participated in more than 40 Federal Circuit matters, arguing several. He has also participated in more than 60 post-grant proceedings, including reexamination, inter partes review (IPR), and covered business method (CBM) proceedings. He is a coauthor of The Practitioner’s Guide to Trials Before the Patent Trial and Appeal Board, Second Edition, published by the American Bar Association, Section of Intellectual Property Law.
Dan also manages complex patent portfolios and provides opinions of counsel and clearance investigations for a variety of mechanical and electrical technologies. Dan has experience litigating and counseling clients on patent issues involving heavy machinery, wear parts, gas turbines, on-road and off-road vehicles, medical devices, outdoor products, imaging devices, feedback control systems, wearables, mobile handsets, telecommunication systems, internet technology, and other computer-related technologies.
Dan represents on a pro bono basis veterans pursuing appeals for disability claims and other parties on Federal Circuit appeals from the Merit Systems Protection Board.
In Re Certain Polycrystalline Diamond Compacts and Articles Containing Same
Secured a decisive victory for client US Synthetic Corp. (USS) at the ITC. After a full hearing, the ALJ found that respondents infringed multiple claims of USS’s patent and that the claims were valid and supported by a domestic industry, but an initial Commission ruling under § 101 temporarily prevented a finding of violation of Section 337. The Federal Circuit reversed the § 101 ruling, and on remand the ITC found a violation and issued a limited exclusion order barring infringing polycrystalline diamond products from entry into the United States, securing final relief for USS.
337-TA-1236, ITC, Judge Elliot
US Synthetic Corporation (USS) v. International Trade Commission (ITC)
Secured a significant victory for client US Synthetic Corporation (USS) with a precedential decision from the U.S. Court of Appeals for the Federal Circuit (CAFC) overturning an unfavorable 35 U.S.C. § 101 eligibility ruling from the International Trade Commission (ITC).
23-1217, Fed. Cir., Judges Chen, Dyk, Stoll
IPR2017-01683, -01684, -01685, PTAB, Judges Barrett, Chung, Easthom, Smith
DataTreasury Corp. v. Fidelity National Information Services, Inc.
2:17-cv-00432, E.D. Tex., Judges Gilstrap, Payne
CBM2014-00020, -00021, PTAB, Judges Clements, Saindon, Tierney
16-1046, -1048, Fed. Cir., Judges Chen, Moore, Wallach
16-883, S. Ct.
Koninklijke Philips NV v. Wangs Alliance Corporation
Finnegan defended plaintiff Philips Lighting (now known as Signify) in a patent infringement suit relating to light-emitting diode (LED) lighting devices and power supplies and successfully defended Philips Lighting in inter partes reviews (IPRs) filed against seven patents, with claims in each patent found not unpatentable. The suit resulted in settlement.
1:14-cv-12298, D. Mass., Judge Casper
IPR2015-01289, -01290, -01292, -01293, -01294, -01453, -01455, PTAB, Judges Perry, Jefferson, Quinn
Välinge Innovation AB v. Halstead New England Corporation, The Home Depot Inc. et al.
1:16-cv-01082, D. Del., Judges Stark, Burke
Articles
Prosecution History Estoppel: Navigating Limits on Equivalents in Patent Litigation Prosecution History Estoppel: Navigating Limits on Equivalents in Patent Litigation
March/April 2026
IP LitigatorPanel Discussion
Careers in Tech and Intellectual Property Careers in Tech and Intellectual Property
February 18, 2026
Salt Lake City
Articles
When Export Controls Meet IP: Lessons from Westinghouse v. KEPCO When Export Controls Meet IP: Lessons from Westinghouse v. KEPCO
January/February 2026
IP LitigatorArticles
Section 337 After Lashify: Practical Implications for Non-U.S. Companies: What the Federal Circuit’s March 2025 Decision Means for Those Who Can Credibly Bring an ITC Case Section 337 After Lashify: Practical Implications for Non-U.S. Companies: What the Federal Circuit’s March 2025 Decision Means for Those Who Can Credibly Bring an ITC Case
November/December 2025
IP LitigatorConference
IAM and WTR Live: Latin America IP Summit 2025 IAM and WTR Live: Latin America IP Summit 2025
November 4-5, 2025
Sao Paulo
Articles
Applying Collateral Estoppel between District Courts and the Patent Trial and Appeal Board Applying Collateral Estoppel between District Courts and the Patent Trial and Appeal Board
September/October 2025
IP LitigatorPress Release
U.S. International Trade Commission Issues Limited Exclusion Order for US Synthetic in Investigation Against Foreign Diamond Makers U.S. International Trade Commission Issues Limited Exclusion Order for US Synthetic in Investigation Against Foreign Diamond Makers
December 23, 2025
Media Mention
ITC Bans Infringing Drill Bit Imports After Fed. Circ. Remand ITC Bans Infringing Drill Bit Imports After Fed. Circ. Remand
December 5, 2025
Law360Award/Ranking
56 Finnegan Attorneys Recognized on the 2024 Capital Pro Bono Honor Roll 56 Finnegan Attorneys Recognized on the 2024 Capital Pro Bono Honor Roll
April 24, 2025
DC BarMedia Mention
Litigator of the Week Runners-Up and Shout Outs: US Synthetic Corp. Litigator of the Week Runners-Up and Shout Outs: US Synthetic Corp.
February 21, 2025
The AmLaw Litigation DailyPress Release
Federal Circuit Overturns ITC Ruling to Give US Synthetic a Significant Victory Federal Circuit Overturns ITC Ruling to Give US Synthetic a Significant Victory
February 20, 2025
Media Mention
Fed. Circ. Revives Drill Bit Patent ITC Found Abstract Fed. Circ. Revives Drill Bit Patent ITC Found Abstract
February 13, 2025
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