Shiga International Patent Office


GranTokyo South Tower, 1-9-2 Marunouchi, Chiyoda-ku

Fax:+81-3-5288-5831 / 5832

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  • One of the leading patent firms in Japan
  • Staff of approximately 7208 former JPO examiners
  • 138 patent and trademark attorneys
  • 3 Japanese attorneys at law
  • 3 Chinese patent attorneys
  • 1 Chinese attorney at law
  • 1 U.S. Patent Agent
  • Approximately 380 technical specialists experienced in R&D and IP matters
  • 7 native English speakers with technical backgrounds
  • 26 litigation specialists who are qualified to represent parties in court in IP infringement litigation

Patent Prosecution

  • Prompt and accurate translation of documents including patent specifications and Office actions
  • Comprehensive analyses and proposals for responding to Office actions with a goal to obtaining the broadest and strongest rights
  • Exerting the utmost effort to avoid problems which might be caused by differences in language, legal systems, and formal requirements


 Trademark and Design Prosecution

  • Flexible services customized to our clients’ needs
  • Comprehensive approach in anticipation of the future enforcement of rights when performing searches and prosecution procedures
  • Undertaking negotiations, trials at the Japanese Patent Office, and lawsuits at the court
  • Proactive analyses and proposals regarding clients’ portfolios based on their business conditions
  • Applying for customs registrations and providing representation in customs seizure procedures

IP Legal Services

  • Comprehensive legal support and advice which match our clients’ strategies and objectives, while taking into consideration all relevant technical issues
  • High-quality and detailed opinions on patentability, validity, and infringement which meet the individual needs of our clients
  • Licensing and consulting
  • Litigation

Patent Searches


  • Uncovering Japanese documents in an attempt to invalidate competitors’ patents
  • Clearance searches prior to product launch
  • Creation of graphic patent portfolios and patent maps