Kato International Patent Office
加藤内外特許事務所
Public patent records for Kato International Patent Office, 1978–2025: 1,772 patent families shared with other firms for 109 clients (applicants). Sign in to explore the app’s partner network, selected filing periods, filing activity, and client relationships.
- Patent families shared with other firms
- 1,772
- 1978–2025. One family can be counted more than once.
- Activity 2016–2020
- 124
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 109
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 5
Activity trend (2017–2026)
- Scope
- Kato International Patent Office · Japan
- Filing years
- 2017–2025
- Unit
- Distinct families per year
2021–2026 are preliminary. Patent filings publish about 18 months after filing, and foreign filings can enter later, so these counts are still filling in.
Each family counts once within a year. A family may recur in multiple years.
View annual counts
| Year | Distinct families per year |
|---|---|
| 2017 | 9 |
| 2018 | 20 |
| 2019 | 26 |
| 2020 | 31 |
| 2021 · preliminary | 30 |
| 2022 · preliminary | 22 |
| 2023 · preliminary | 17 |
| 2024 · preliminary | 1 |
| 2025 · preliminary | 1 |
Frequently associated firms
Firms that most often appear on the same patent families. One family can be counted more than once, so these are not unique totals.
Similar Japan firms
Yearly counts since 1990, added up. One family can be counted more than once.
- Kuzuwa International Patent Office1,775 shared patent families
- Nishikawa International Patent Office西川国際特許事務所1,780 shared patent families
- IP Crew Patent Attorneys弁理士法人ＩＰ ＣＲＥＷ1,789 shared patent families
- YOSHIDA, YOSHITAKE & ARITA PATENT OFFICE吉田・吉竹・有田特許事務所1,795 shared patent families
- Sonoda & Kobayashi Patent Attorneys1,748 shared patent families
Compare Kato International Patent Office side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for Kato International Patent Office. App counts follow the filing years and corridors you choose, so they can differ from this public profile.
Filing activity
Recorded patent families across the filing years you choose.
Full partner list
Every observed counterpart for the filing period you choose.
Named clients
Applicant relationships behind the exchange counts.