Japanese utility models (実用新案) offer foreign counsel a fast, low-cost registration option for hardware inventions. However, the enforcement constraints are significant, and the protection scope differs from patents. This guide explains when UM filing makes strategic sense.
Table of Contents
Japanese utility models, governed by the Utility Model Act (実用新案法), are registration rights covering "device" (考案) related to the shape, structure, or combination of articles. The system traces back to the 19th century Meiji era and was reformed in 1994 to remove substantive examination.
Key characteristics:
| Aspect | Utility Model | Patent |
|---|---|---|
| Subject matter | Shape/structure of articles only | Any technical solution |
| Examination | None (formality only) | Substantive (novelty + inventive step) |
| Time to registration | 2-6 months | 14-30 months |
| Term | 10 years | 20 years (25 for pharma/agrochemicals) |
| Enforcement | Restricted (need Technical Evaluation Report) | Direct |
| Damages if invalidated | UM owner liable | Generally no liability |
| Inventive step bar | Lower (slight design effort) | Higher (non-obvious to skilled person) |
| Typical filing cost | ¥75,000 + ¥6,000/claim | ¥120,000 + ¥4,000/claim |
The 1994 reforms removed substantive examination but added critical enforcement constraints to balance the risk:
Technical Evaluation Report (TER): Before sending a cease-and-desist letter or filing UM infringement litigation, the right holder must obtain a TER (技術評価書) from the JPO. The TER is essentially a post-grant examination that takes 4-6 months and costs ¥42,000 + ¥1,000/claim.
Key TER risks:
A UM can be converted to a patent application within 3 years from filing (or within 30 days of receiving a TER). This is a strategic backup: file UM first for speed, then convert to patent if commercial importance warrants 20-year protection.
Foreign Counsel Tip: For PCT national phase entries into Japan, you can elect UM instead of patent at the 30-month deadline. This is rarely done because PCT applicants usually want patent strength, but it can be useful for fast-moving consumer hardware.
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Request a QuoteService OverviewQ. What is a Japanese utility model (実用新案)?
A. A utility model (UM) is a Japanese registration right that protects the shape, structure, or combination of articles. Unlike patents, UMs are granted without substantive examination, making them faster and cheaper but providing weaker enforcement rights.
Q. How fast can I get a Japanese utility model?
A. Typically 2-6 months from filing to registration. There is no substantive examination — only a basic formality check. This is significantly faster than the 14-30 months for patent grant.
Q. What is the term of a Japanese utility model?
A. 10 years from the filing date, compared to 20 years for utility patents. UMs cannot be extended.
Q. Can I enforce a utility model in Japan?
A. Yes, but with significant restrictions. Before filing infringement litigation, you must obtain a Technical Evaluation Report (技術評価書) from the JPO. Without this, suing on a UM is restricted, and you may be liable for damages if the UM is later invalidated.
Q. Should I file UM or patent for foreign-origin inventions?
A. For most foreign-origin inventions, patents are preferred. UMs are useful for short-lifecycle products (consumer goods, fashion accessories, mechanical components) where speed matters more than 20-year protection. They are NOT available for methods/processes/software.