Seiwa Patent & Law Office Tokyo
Public patent records for Seiwa Patent & Law Office Tokyo, 1978–2026: 27,073 patent families shared with other firms for 1,779 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
- 27,073
- 1978–2026. One family can be counted more than once.
- Activity 2016–2020
- 2,852
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 1,779
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 6
Activity trend (2017–2026)
- Scope
- Seiwa Patent & Law Office Tokyo · 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 | 370 |
| 2018 | 332 |
| 2019 | 786 |
| 2020 | 796 |
| 2021 · preliminary | 676 |
| 2022 · preliminary | 800 |
| 2023 · preliminary | 487 |
| 2024 · preliminary | 106 |
| 2025 · preliminary | 4 |
| 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 |
|---|---|---|
| Filters implantable into blood vessels; prostheses; devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents; orthopaedic, nursing or contraceptive devices; fomentation; treatment or protection of eyes or ears; bandages, dressings or absorbent pads; first-aid kitsIPC/CPC A61F | 6.5% | 3.7× |
| Wireless communication networksIPC/CPC H04W | 9.1% | 1.7× |
| Fermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixtureIPC/CPC C12P | 2.3% | 1.5× |
| TransmissionIPC/CPC H04B | 2.9% | 1.5× |
Yearly counts for 2018–2022, added up: 6,039 of 7,483 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.
- ITOH International Patent Office弁理士法人ＩＴＯＨ25,273 shared patent families
- SUZUYE & SUZUYE弁理士法人鈴榮特許綜合事務所21,920 shared patent families
- Sakai International Patent Office弁理士法人酒井国際特許事務所21,506 shared patent families
- Nakamura Joint Patent & Law Office Tokyo中村合同特許法律事務所 東京21,190 shared patent families
- Yamamoto Patent山本特許法律事務所20,775 shared patent families
Compare Seiwa Patent & Law Office Tokyo side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for Seiwa Patent & Law Office Tokyo. 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.