the firm's post-grant practitioners are some of the most experienced in the country.


Artificial Intelligence (AI)
Artificial Intelligence (AI)
Digital Health
Digital Health
Energy & Renewables
Energy & Renewables

Fast Facts

About Our

Law Firm

About Our Law Firm

Headquartered within steps of the USPTO with an affiliate office in Tokyo, Oblon is one of the largest law firms in the United States focused exclusively on intellectual property law.

Get to know our


Get to know our History

Norman Oblon with Stanley Fisher and Marvin Spivak launched what was to become Oblon, McClelland, Maier & Neustadt, LLP, one of the nation's leading full-service intellectual property law firms.

Our Local and

Global Reach

Our Local and Global Reach

Outside the US, we service companies based in Japan, France, Germany, Italy, Saudi Arabia, and farther corners of the world. Our culturally aware attorneys speak many languages, including Japanese, French, German, Mandarin, Korean, Russian, Arabic, Farsi, Chinese.

A few of our


A few of our ACCOLADES

Oblon's professionals provide industry-leading IP legal services to many of the world's most admired innovators and brands.




From the minute you walk through our doors, you'll become a valuable part of a team that fosters a culture of innovation, client service and collegiality.

A few ways to

GET In Touch

A few ways to GET In Touch
US Office

Telephone: 703-413-3000
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Tokyo Office

Telephone: +81-3-6212-0550
Learn More +


Patent Forms

Downloadable Patent Forms

The United States Patent and Trademark Office (USPTO) issued final rules implementing the inventor's oath or declaration provisions of the America Invents Act (AIA) on August 14, 2012.

Daniel J. Pereira, Ph.D.

Daniel J. Pereira, Ph.D.

Managing Partner ∙ US Office
T: (703) 413-6560
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Daniel (Dan) J. Pereira, Ph.D., is the firm's Managing Partner, Co-Head of the Chemical Practice Group and member of the management committee. His practice focuses on client counseling, portfolio management, patent prosecution, litigation and interferences involving a wide range of technologies including battery materials (including solid electrolytes, solid-state batteries, and anode and cathode materials for lithium-ion batteries), recombinant DNA technology, genetics, immunology, enzymology, medical diagnostics, bioinformatics, microarrays, statistical data analysis, genomics, proteomics, nanotechnology, polymer chemistry, metallurgy, solar technology, imaging, medical devices, optical films, coatings, cosmetics, catalysts, ceramics, alloys, chemical engineering, optical and electronic devices. Dr. Pereira has particular expertise in the medical, biotechnology, and pharmaceutical fields.

Dr. Pereira has served as co-counsel on interferences cases, advising on issues ranging from strategies for avoiding interferences to strategies for provoking them. He has also acted as co-counsel in declared interferences. Dr. Pereira handles appeals before the Patent Trial and Appeal Board (PTAB), district court patent litigations, and Federal Circuit appeals, and has extensive experience providing pre-litigation and litigation avoidance counseling to clients. Additionally, Dr. Pereira assists both foreign and domestic clients of all sizes with licensing and contract negotiations, due diligence analyses and risk assessment in intellectual property asset acquisition transactions.

Prior to joining the firm, Dr. Pereira worked as a post-doctoral research scientist at the Mount Sinai School of Medicine where he conducted research in the fields of neurodegeneration and transgenic mouse models of human disease. While obtaining his degrees, he studied gene expression and gene therapy and performed research in the area of leukemia pathogenesis.


  • George Washington University Law School (J.D.)
  • State University of New York at Stony Brook (Ph.D.)
    • Genetics
  • Earlham College (B.A.)


  • Virginia
  • Registered to practice before the U.S. Patent and Trademark Office


  • The Best Lawyers in America® (2024)
  • IAM Patent 1000: The World's Leading Patent Professionals - selected as Top Patent Professional (2020-2022)
  • Named as Rising Star by SuperLawyers (2014)