Sakai International Patent Office
弁理士法人酒井国際特許事務所
Public patent records for Sakai International Patent Office, 1978–2026: 22,667 patent families shared with other firms for 1,921 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
- 22,667
- 1978–2026. One family can be counted more than once.
- Activity 2016–2020
- 3,376
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 1,921
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 5
Activity trend (2017–2026)
- Scope
- Sakai International Patent 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 | 256 |
| 2018 | 369 |
| 2019 | 1,044 |
| 2020 | 1,203 |
| 2021 · preliminary | 825 |
| 2022 · preliminary | 887 |
| 2023 · preliminary | 357 |
| 2024 · preliminary | 249 |
| 2025 · preliminary | 6 |
| 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 |
|---|---|---|
| Inorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiationIPC/CPC H10F | 2.7% | 3.9× |
| Air-conditioning; air-humidification; ventilation; use of air currents for screeningIPC/CPC F24F | 2.3% | 3.9× |
| Antennas, i.e. radio aerialsIPC/CPC H01Q | 2.1% | 3.0× |
| TransmissionIPC/CPC H04B | 4.6% | 2.4× |
| Apparatus for conversion between AC and AC, between AC and DC, or between DC and DC, and for use with mains or similar power supply systems; conversion of DC or AC input power into surge output power; control or regulation thereofIPC/CPC H02M | 2.0% | 2.3× |
Yearly counts for 2018–2022, added up: 3,738 of 5,344 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.
- SUZUYE & SUZUYE弁理士法人鈴榮特許綜合事務所21,920 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
- ITOH International Patent Office弁理士法人ＩＴＯＨ25,273 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
Compare Sakai International Patent Office side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for Sakai 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.