Kaiyu International Patent Office
特許業務法人快友国際特許事務所
Kaiyu International Patent Office is a Japan-based patent law firm with 44 years of recorded international activity (1978–2021). 1,157 total international patent cases are on record, spanning 4 foreign jurisdictions and 305 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
- 1,157
- Last 5 years
- 0
- Applicants
- 305
- Flow type
- Incoming-heavy
Applicant count reflects distinct corporate clients represented in outgoing filings.
Activity trend (last 10 years)
Top international partners
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 Kaiyu International Patent Office.