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

Richard D. Kelly
Akihiro  Yamazaki
Jenchieh (Joseph) Yuan
Craig R. Feinberg
Philippe J.C. Signore, Ph.D.
Frank J. West
John S. Kern
Robert W. Downs
Christopher  Ricciuti
Michael R. Casey, Ph.D.
Kevin M. McKinley
Tao  Feng, Ph.D.
Kevin Ross  Davis
Bogdan A. Zinchenko
Long  Phan, Ph.D.
Brian B. Darville
Jianping (James)  Wu
Thomas M. Cunningham, Ph.D.
Charles L. Gholz
Aldo  Martinez
Jeffrey B. McIntyre
Eric W. Schweibenz
Derek  Lightner, Ph.D.
Ryan W. Smith
Stefan Uwe  Koschmieder, Ph.D.
Sameer  Gokhale
James R. Love
Nicholas  Rosa, Ph.D.
Teddy S. Gron
Colin B. Harris
Arthur I. Neustadt
Alexander B. Englehart
Grace E. Kim
Jay E. Rowe, Jr., Ph.D.
Christopher I. Donahue
Andrew M. Ollis
Alec M. Royka
Dale M. Shaw
Edwin D. Garlepp
Elissa L. Sanford
Kurt M. Berger, Ph.D.
Norman F. Oblon
Carl E. Schlier
Yuki  Onoe
Surinder  Sachar
Yorikatsu  Hohokabe, Ph.D.
Marina I. Miller, Ph.D.
Daniel J. Pereira, Ph.D.
John F. Presper
Kevin L. Hartman, Ph.D.
Eckhard H. Kuesters
John  Sipos
Kasumi  Kanetaka
David M. Longo, Ph.D.
J. Derek  Mason, Ph.D., CLP
Yuanyi (Alex) Zhang, Ph.D.
Robert T. Pous
Chika (Teranishi) Iitoyo
Tia D. Fenton
Robert  Tarcu
Diane  Jones
Stephen G. Baxter, Ph.D.
Steven B. Chang


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
Learn More +

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.

J. Derek  Mason, Ph.D., CLP

J. Derek Mason, Ph.D., CLP

Partner ∙ US Office
T: (703) 413-3000
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J. Derek Mason, Ph.D., CLP, a chemical industry IP attorney and Certified Licensing Professional, is a partner in the Chemical Patent Prosecution practice group, and chair of the IP Transactions practice group. Dr. Mason focuses his practice on patent preparation and prosecution, licensing, intellectual property issues arising in various types of corporate transactions, client counseling and opinions on various intellectual property issues.

A former chemist with a doctorate in organic chemistry, Dr. Mason works with both companies and other law firms, advising on a broad range of intellectual property concerns. He conducts due diligence investigations and risk assessment with respect to intellectual property ownership in corporate mergers and acquisitions. Additionally, he helps both foreign and domestic companies establish and develop patent portfolios, avoid infringement when launching new products, and formulate and implement procedures to protect their innovations and enhance their use and value.

Dr. Mason represents both international and domestic clients on a wide array of chemical and related technologies including medical and biotech diagnostic devices, polymers, nanotechnology, textiles, petrochemicals, and pharmaceuticals. He also counsels on creative design-around strategies, and the interplay of utility and design patents, trade-secret protection, and litigation avoidance.

Dr. Mason’s thorough understanding of the sciences and technical aspects of his clients’ innovations enables him to skillfully represent their interests. While achieving his doctorate and undergraduate degrees, Dr. Mason studied organometalloid chemistry and conducted research in the area of organic photochemistry, publishing and presenting papers in both of these areas. Prior to entering patent law, he also worked as a chemist for a diversified international chemical company.


  • George Washington University National Law Center (J.D.)
  • University of Wisconsin (Ph.D.)
    • Organic Chemistry
  • University of North Carolina at Chapel Hill (B.S., highest honors)
    • Chemistry


  • Virginia
  • Registered to practice before the U.S. Patent and Trademark Office
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals for the Fourth Circuit
  • U.S. District Court for the Eastern District of Virginia
  • Supreme Court of Virginia


  • Best Lawyers in America - Patent Law (2020-2022)
  • Intellectual Asset Management (IAM) Patent 1000: The World’s Leading Patent Professionals, named to its list of the top 1000 patent attorneys in the world; recognized in the Washington, D.C. Metro Area (2016, 2017, 2019-2021)
  • Named to the The World's Leading IP Strategists: IAM Strategy 300 (2015, 2016, 2017, 2018, 2019)
  • Certified Licensing Professional (CLP) (2014), awarded by Certified Licensing Professionals, Inc.
  • Phi Beta Kappa (1983)
  • Phi Eta Sigma (National Freshman Honor Society) (1980)
  • Alpha Chi Sigma (National Chemistry Fraternity) (1982)
  • Recognized as the "Best Chemical Industry IP Attorney of the Year - USA" by Global 100 - 2018

Professional Affiliations

  • American Bar Association
  • American Chemical Society
  • American Intellectual Property Law Association (AIPLA)
  • Licensing Executives Society
  • Virginia Bar Association