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