Meisei International Patent Office
特許業務法人明成国際特許事務所
Meisei International Patent Office is a Japan-based patent law firm with 36 years of recorded international activity (1990–2025). 5,805 total international patent cases are on record, spanning 4 foreign jurisdictions and 1,102 distinct corporate applicants. This public snapshot is drawn from FlowIP's IP5 patent exchange dataset; full partner lists, time series, and decision-maker analysis are available to signed-in users.
- Total cases
- 5,805
- Last 5 years
- 272
- Applicants
- 1,102
- Flow type
- Incoming-heavy
Applicant count reflects distinct corporate clients represented in outgoing filings.
Activity trend (last 10 years)
Top international partners
Sends cases to
- MERH-IPEP419 cases
- Sughrue MionUS176 cases
- Osha LiangUS148 cases
- Oblon McClellandUS146 cases
- INVENSYNC Intellectual Property GroupKR130 cases
Similar Japan firms
See the full picture
This public profile shows the top 5 partners, summary trend, and aggregate applicant count. Sign in to see the complete partner list, year-by-year breakdown, decision-maker analysis (firm vs client-driven), and named top applicants for Meisei International Patent Office.