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John Duy Tran

John Duy Tran

also known as John D. Tran

Practice areas:

Patent Application, Patent Infringement, Trademark Application, Trademark Infringement, Intellectual Property

About Me



  • John D. Tran is a Registered Patent Attorney and an Intellectual Property Trial Lawyer. Recognized as a SuperLawyers' "Rising Star" by Findlaw/Thomson Reuters, an honor reserved for the top 2.5% of lawyers in Southern California under the age of 40, Mr. Tran is highly sought after for his experience in both transactional and litigation intellectual property matters involving Patents, Trademarks and Copyrights.  Mr. Tran is the Managing Partner at the Rhema Law Group, P.C. 

  • General IP Counsel to Lee's Sandwiches International, Inc.



  • OC WEEKLY "Best-Idea Lawyer" Award 2011

  • Super Lawyers Rising Star 2009-2012;

  • OC METRO Top Lawyers Selection 2011;

  • AVVO Superb Rating



Mr. Tran is a Patent Trial Lawyer with experience in litigating patent infringement lawsuits in a variety of technologies. Although typically only 2-3% of patent cases ever proceed through trial, Mr. Tran has already successfully tried a case to jury verdict. 

In addition, Mr. Tran has litigated trademark matters before both the Federal Courts and before the Trademark Trials and Appeals Board (“TTAB”). Before the TTAB, Mr. Tran has an unblemished record of success in obtaining and defending against cancellation/opposition proceedings.




His experience and knowledge as a patent trial lawyer also provides Mr. Tran the ability to draft patent applications that withstand litigation. Mr. Tran has authored various patent applications on technologies ranging from medical devices, software, business methods, and simple to complex mechanical devices. In addition, he has obtained numerous design patent applications for the apparel, computer, automotive and furniture industries. In addition he routinely handles infringement opinions, validity studies, invention consulting, patent portfolio audits, and patent licenses. He serves clients worldwide and has represented companies based in Taiwan, China, Korea, UK and Vietnam.


For more information:


Languages Spoken: Mandarin, Cantonese, Vietnamese, Japanese

Photos and Videos

99970 1303201416

99970 1339654952

Practice Areas

Licensed since 2004

  1. Patent Infringement: 40%
    11 years
  2. Patent Application: 40%
    14 years
  3. Trademark Application: 10%
    14 years
  4. Intellectual Property: 5%
    11 years
  5. Trademark Infringement: 5%
    11 years



Fixed (Always)

Payment Types:

Cash, Check, Credit Card

Attorney Endorsements

21 total 

  • Martin Elias Jerisat

    John is an amazing lawyer, he combines deep knowledge in patent law with solid trial skills. He is also quick to grasp any technical details. I highly recommend him.


    Martin Jerisat Litigation Attorney
    Relationship: Worked together on matter

  • Caryn Hong Thuy Nguyen

    John is the attorney I recommend to handle any IP matters. He's an expert in his field, smart and dedicated to his clients. I have seen him come to work early and leave late to get the job done. He is a respected colleague and good friend.


    Caryn Nguyen Family Attorney
    Relationship: Fellow lawyer in community

Contact Info


1 Park Plaza
Suite 600
Irvine, CA, 92614



Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Super Lawyer Rising StarSuper Lawyers Magazine2011
OC Metro Top LawyersOC Metro2011
"Best-Idea Lawyer"OC WEEKLY2011
One of the Top Patent & Trademark Firm in U.S.IP Today Magazine2010
VANG GOLDEN TORCH AWARDVietnamese American National Gala2009

Work Experience
TitleCompany NameDuration
PartnerBuus, Kim, Kuo & Tran, P.C/ Ardent Law Group2006 - 2011
Patent AttorneyOswald & Yap, LLP2004 - 2006
General Trademark CounselLee's Sandwiches International, Inc.2001 - Present

Association NamePosition NameDuration
American Intellectual Property Law AssociationMember2005 - Present
Vietnamese American Bar Association of Southern CaliforniaMember2005 - Present
Orange County Patent Law AssociationMember2004 - Present
American Bar AssociationMember2004 - Present
Orange County Bar AssociationMember2004 - Present
Orange County Asian American Bar AssociationMember2004 - Present

Legal Cases
Case NameOutcome
Patent LawsuitPlaintiff victory against 50 defendants
Trademark Opposition ProceedingSuccessfully dismissed Trademark Opposition
Internet Domain DisputeSuccessfully dismissed Internet Domain Complaint

See all Legal Cases 

Publication NameTitleDate
Nha MagazineFrom Ideas to Profit2006

School NameMajorDegreeGraduated
Whittier College School of LawLawJD - Juris Doctor2002
University of the Incarnate WordBiologyBS - Bachelor of Science1996
University of Texas at AustinBiologyN/AN/A

Speaking Engagements
Conference NameTitleDate
Vietnamese American National GalaHonoring Excellence & Community2009