KOTOBUKI Patent & Trademark Office
Public patent records for KOTOBUKI Patent & Trademark Office, 1978–2026: 17,557 patent families shared with other firms for 1,915 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
- 17,557
- 1978–2026. One family can be counted more than once.
- Activity 2016–2020
- 2,579
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 1,915
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 4
Activity trend (2017–2026)
- Scope
- KOTOBUKI Patent & Trademark Office · Japan
- Filing years
- 2017–2026
- 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 | 319 |
| 2018 | 321 |
| 2019 | 774 |
| 2020 | 743 |
| 2021 · preliminary | 675 |
| 2022 · preliminary | 655 |
| 2023 · preliminary | 402 |
| 2024 · preliminary | 75 |
| 2025 · preliminary | 5 |
| 2026 · partial year | 1 |
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 |
|---|---|---|
| Heterocyclic compoundsIPC/CPC C07D | 10.8% | 2.6× |
| Specific therapeutic activity of chemical compounds or medicinal preparationsIPC/CPC A61P | 24.6% | 2.5× |
| PeptidesIPC/CPC C07K | 10.7% | 2.3× |
| Preparations for medical, dental or toiletry purposesIPC/CPC A61K | 28.7% | 2.3× |
| Microorganisms or enzymes; compositions thereof; propagating, preserving, or maintaining microorganisms; mutation or genetic engineering; culture mediaIPC/CPC C12N | 11.1% | 2.0× |
Yearly counts for 2018–2022, added up: 4,666 of 5,687 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.
- Yuasa Hara17,905 shared patent families
- Suzue International Patent Office弁理士法人スズエ国際特許事務所18,666 shared patent families
- Sonderhoff & Einsel Patent Law Officeゾンデルホフ＆アインゼル法律特許事務所19,992 shared patent families
- Soen International創英国際特許法律事務所15,065 shared patent families
- Yamamoto Patent山本特許法律事務所20,775 shared patent families
Compare KOTOBUKI Patent & Trademark Office side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for KOTOBUKI Patent & Trademark 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.