Keisen International Patent Office
恵泉国際特許事務所
Public patent records for Keisen International Patent Office, 1978–2024: 1,078 patent families shared with other firms for 161 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
- 1,078
- 1978–2024. One family can be counted more than once.
- Activity 2016–2020
- 135
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 161
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 6
Activity trend (2017–2026)
- Scope
- Keisen 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 | 26 |
| 2018 | 16 |
| 2019 | 32 |
| 2020 | 35 |
| 2021 · preliminary | 39 |
| 2022 · preliminary | 47 |
| 2023 · preliminary | 20 |
| 2024 · preliminary | 4 |
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 |
|---|---|---|
| Diagnosis; surgery; identificationIPC/CPC A61B | 17.8% | 2.9× |
| Preparations for medical, dental or toiletry purposesIPC/CPC A61K | 20.9% | 1.7× |
| Specific therapeutic activity of chemical compounds or medicinal preparationsIPC/CPC A61P | 16.4% | 1.6× |
Yearly counts for 2018–2022, added up: 225 of 271 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.
- 赤穂特許事務所1,083 shared patent families
- Sanada Patent Firm弁理士法人真田特許事務所1,085 shared patent families
- Tokyo Central Patent Office1,067 shared patent families
- Seishin Patent Law Office1,063 shared patent families
- Hanabusa Patent & Trademark Office弁理士法人はなぶさ特許商標事務所1,098 shared patent families
Compare Keisen International Patent Office side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for Keisen 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.