Kato International Patent Office
弁理士法人加藤国際特許事務所
Public patent records for Kato International Patent Office, 1978–2024: 751 patent families shared with other firms for 56 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
- 751
- 1978–2024. One family can be counted more than once.
- Activity 2016–2020
- 140
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 56
- 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
- 2017–2024
- 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 | 22 |
| 2018 | 29 |
| 2019 | 27 |
| 2020 | 18 |
| 2021 · preliminary | 8 |
| 2022 · preliminary | 5 |
| 2023 · preliminary | 2 |
| 2024 · preliminary | 6 |
Technology fields it focuses on
Fields where this firm's share of patent families is well above the average for Japan firms, 2018–2022.
| Field | Share of its families | vs Japan average |
|---|---|---|
| Non-portable lighting devices; systems thereof; vehicle lighting devices specially adapted for vehicle exteriorsIPC/CPC F21S | 16.8% | 34.2× |
| Arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in generalIPC/CPC B60Q | 8.0% | 23.4× |
| Investigating or analysing materials by determining their chemical or physical propertiesIPC/CPC G01N | 8.0% | 1.6× |
Yearly counts for 2018–2022, added up: 435 of 768 families carry an IPC or CPC classification. Shares are of those classified families, and one family can fall in several fields.
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.
- MAEDA SoGo Patent Attorney Office前田総合特許事務所746 shared patent families
- Ohchi International IP弁理士法人旺知国際特許事務所758 shared patent families
- R&C Patent Firm740 shared patent families
- Konishi Nagaoka Patent Office小西永岡特許事務所739 shared patent families
- R&C IP LAW FIRM735 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.