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

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


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.

Ching-Cheng (Tony)  Chang

Ching-Cheng (Tony) Chang

Senior Associate ∙ US Office
T: (703) 413-3000
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Ching-Cheng (Tony) Chang is an attorney in the Electrical Patent Prosecution. His practice is focused on the preparation and prosecution of patents for domestic and International clients. Prior to joining Oblon, Mr. Chang was an associate at another Alexandria, Virginia IP law firm for more than five years.

His experience is primarily in the areas of:

  • Analog and digital circuits
  • Electronics & Software
  • Semiconductor manufacturing processes
  • Semiconductor manufacturing equipment
  • Telecommunications, including Error Correction Codes and Advanced Television Systems Committee (ATSC) Standards
  • Video Coding/Decoding Technology, including H.264, High Efficiency Video Coding (HEVC), and Versatile Video Coding (VVC) standards

Before law school, Mr. Chang worked as an in-house patent engineer in a Taiwanese electronic company, where he negotiated with patentees regarding patent validity and infringement disputes and managed patent applications. Additionally, he was a research engineer in wireless communications, including antenna design, RF and analog circuit design, GUI programming and protocol programming.


  • Temple University, Beasley School of Law (J.D.)
  • National Taiwan University (M.Sc.)
    • Communication Engineering
  • National Taiwan University (B.Sc.)
    • Electrical Engineering


  • Virginia
  • Registered to practice before the United States Patent and Trade Office


  • Chinese
  • Taiwanese