Kusumoto Patent Office (Japanese Patent Law Office)

Kusumoto Patent Office, founded in 1987, handles patent, utility model, trademark, and design prosecution in Japan and worldwide, successfully resolving intellectual property-related problems, such as through civil actions, to obtain patents in all technical fields.  We provide our clients with fast, effective assistance and counsel in maintaining their intellectual property rights.

Our world network of foreign patent law organizations includes firms in the United States of America, Canada, United Kingdom, Germany, France, Russia, Australia, China, Hong Kong, Taiwan, South Korea, Thailand, India, Indonesia, Singapore, Vietnam, etc.

The patent applications we file at the request of clients abroad are increasing steadily in number.


  • Patent Application
  • Utility Model Registration Application
  • Design Registration Application
  • Trademark Registration Application
  • Translation of Technical and Legal Documents

Kusumoto Patent Office Organization

  1. Patent and Utility Model Department
    • Mechanical, Civil Engineering & Construction Group
    • Electrical & Information Technology Group
    • Chemical & Biotechnology Group
  2. Trademark & Design Department
  3. Patent & Trademark Search Department
  4. Translation Department
  5. Domestic Filing Department
  6. Overseas Filing Department
  7. On-line Application & Drawing Preparation Department

Kusumoto Patent Office has six patent attorneys available.

We have clients in various industries including major corporations, such as Nitto Denko Corporation, Daikin Industries, Ltd., Kyocera Corporation, Nissin Food Products Co., Ltd., Kaneka Corporation, Gunze Limited, and Shiga Prefectural Government.

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