Seiran International Patent Office
弁理士法人青藍国際特許事務所
Public patent records for Seiran International Patent Office, 1979–2025: 552 patent families shared with other firms for 42 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
- 552
- 1979–2025. One family can be counted more than once.
- Activity 2016–2020
- 154
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 42
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 5
Activity trend (2017–2026)
- Scope
- Seiran 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 | 6 |
| 2018 | 22 |
| 2019 | 48 |
| 2020 | 61 |
| 2021 · preliminary | 57 |
| 2022 · preliminary | 57 |
| 2023 · preliminary | 18 |
| 2024 · preliminary | 5 |
| 2025 · preliminary | 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 |
|---|---|---|
| Dentistry; apparatus or methods for oral or dental hygieneIPC/CPC A61C | 9.4% | 21.3× |
| Compounds containing metals not covered by subclasses C01D or C01FIPC/CPC C01G | 12.9% | 19.3× |
| Lime, magnesia; slag; cements; compositions thereof, e.g. mortars, concrete or like building materials; artificial stone; ceramics; refractories; treatment of natural stoneIPC/CPC C04B | 8.8% | 9.9× |
| Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energyIPC/CPC H01M | 39.3% | 7.1× |
| Organic electric solid-state devicesIPC/CPC H10K | 6.6% | 4.5× |
Yearly counts for 2018–2022, added up: 544 of 641 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.
- TOWA INTERNATIONAL PATENT FIRM弁理士法人東和国際特許事務所555 shared patent families
- Nippon Kayaku Co. Ltd. IP Division549 shared patent families
- Koshikawa International Patent Office越川国際特許事務所556 shared patent families
- Neo Flight International Trademark & Patent Officeネオフライト国際商標特許事務所543 shared patent families
- Serio International Patent and Trademark Officeセリオ国際特許商標事務所565 shared patent families
Compare Seiran International Patent Office side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for Seiran 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.