Practice Areas

The Law Offices of Tien-Tin Yiu has been providing high quality legal service to its clients since 1985.  Based in Los Angeles, California, our office is in the prime position to assist you with your needs.  Whether you are coming from overseas or simply in the neighborhood, you can rest easy knowing that we have lots of experience not only serving the local communities but also in assisting foreign clients, particularly Japanese, Chinese/Taiwanese corporations and individuals, make their way to the United States.  And whether your needs are domestic or international in scope, we know your business, the language you speak, the competition you face, and the deadlines you must meet.  For over 25 years we have been handling our clients matters promptly and efficiently to ensure the best possible service for your needs, so come in and see us today. 

Our principal areas of practice include:

  Intellectual Property Law Immigration Law
International Law
  • Trademark (Domestic & International)
    • Filing, Registration, and Enforcement
  • Copyright
    • Filing, Registration, and Enforcement
  • IP Transactions
  • International IP Transfers
  • Licensing Agreements
  • Trade Secrets
  • Unfair Competition






  • Citizenship
    • Naturalization
  • Visas
    • Immigrant
      • Family-Based
      • Employment-Based
    • Non-Immigrant
      • E1 (Treaty Traders)
      • E2 (Treaty Investors)
      • H1 (Temporary Professional Workers)
      • L1 (Intra-Company Transferees)
      • U.S. Non-Immigrant Visas at U.S. Consulates in Canada & Mexico for Third Country Nationals


  • Special Emphasis U.S. / Asia Pacific Relations
    • Japan
    • China
    • Taiwan
  • International Joint Ventures
  • International Partnerships
  • International Trade
  • International Distributorship/Agency
  • International Protection and Enforcement of Intellectual Property Rights





  Labor and Employment Law Corporate and Commercial Law Customs
  • Employment Contracts
  • Executive Compensation Agreements
  • Non-Competition and Confidentiality Agreements
  • Severance Agreements
  • Wrongful Discharge
  • Employee Handbooks and Policy Manuals
  • Agency Agreements
  • Contracts
  • Corporate Formation and Governance
  • Mergers and Acquisitions
  • Sale Agreements
  • Real Estate Investments


  • Fines / Penalties / Forfeitures
  • Export Licensing
  • Customs Enforcement of Intellectual Property Rights
    • Patents
    • Trademarks
    • Copyrights