TSUTSUI PATENT OFFICE
弁理士法人筒井国際特許事務所
TSUTSUI PATENT OFFICE is a Japan-based patent law firm with 36 years of recorded international activity (1990–2025). 2,420 total international patent cases are on record, spanning 4 foreign jurisdictions and 570 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
- 2,420
- Last 5 years
- 210
- Applicants
- 570
- 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
Similar Japan firms
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- Sunnext International Patent Office弁理士法人サンネクスト国際特許事務所 (届出番号:G0252)2,468 cases
- Ashida-Kimura International Patent Office木村 満2,483 cases
- CP Japan Patent Office2,345 cases
- Kita-Aoyama International Patent Attorneys弁理士法人北青山インターナショナル2,500 cases
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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 TSUTSUI PATENT OFFICE.