RYUKA & PARTNERS
龍華国際特許業務法人
Public patent records for RYUKA & PARTNERS, 1978–2025: 6,960 patent families shared with other firms for 565 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
- 6,960
- 1978–2025. One family can be counted more than once.
- Activity 2016–2020
- 1,376
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 565
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 5
Activity trend (2017–2026)
- Scope
- RYUKA & PARTNERS · 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 | 184 |
| 2018 | 88 |
| 2019 | 302 |
| 2020 | 531 |
| 2021 · preliminary | 255 |
| 2022 · preliminary | 750 |
| 2023 · preliminary | 185 |
| 2024 · preliminary | 157 |
| 2025 · preliminary | 6 |
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 |
|---|---|---|
| Measuring electric variables; measuring magnetic variablesIPC/CPC G01R | 7.3% | 5.9× |
| Electric power networks; circuit arrangements or systems for supplying or distributing electric power; systems for storing electric energyIPC/CPC H02J | 9.0% | 5.8× |
| Propulsion of electrically-propelled vehicles; supplying electric power for auxiliary equipment of electrically-propelled vehicles; electrodynamic brake systems for vehicles in general; magnetic suspension or levitation for vehicles; monitoring operating variables of electrically-propelled vehicles; electric safety devices for electrically-propelled vehiclesIPC/CPC B60L | 5.1% | 4.4× |
| Inorganic electric semiconductor devicesIPC/CPC H10D | 3.9% | 4.0× |
| Magnets; inductances; transformers; selection of materials for their magnetic propertiesIPC/CPC H01F | 3.0% | 3.2× |
Yearly counts for 2018–2022, added up: 1,213 of 2,220 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.
- GPOJ Patent FirmＧＰＯＪ特許事務所7,245 shared patent families
- 安村法律事務所6,612 shared patent families
- Shobayashi International Patent and Trademark Office, P.C.弁理士法人正林国際特許商標事務所7,330 shared patent families
- Symphonia Intellectual Property Office清水 初志6,461 shared patent families
- Abe Ikubo Katayama Law6,220 shared patent families
Compare RYUKA & PARTNERS side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for RYUKA & PARTNERS. 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.