Korean inventions filed in the US rose 46%
KR → US+46%KR → JP+38%KR → EP+24%KR → CN+17%CN → US+12%EP → KR+9%EP → US+8%CN → JP+7%CN → KR+6%CN → EP+6%EP → JP+5%JP → KR+4%JP → US+2%US → KR+2%US → JP+1%US → EP-1%JP → EP-2%JP → CN-3%US → CN-5%EP → CN-9%
152Kpatent families in the busiest corridorCN→US
+46%the fastest-growing corridorKR→US
25%of CN → US work goes to ten firms in the USCN→US
Corridors
Firms sending work from China
| # | Firm | Share | Breadth | Openness | ||||
|---|---|---|---|---|---|---|---|---|
| 1 | · | CCPIT Patent and Trademark Law Office | 277 | 6.6% | +0.41 | 4 | 1 | |
| 2 | ▲2 | BEIJING WANHUIDA INTELLECTUAL PROPERTY AGENCY CO., LTD. | 239 | 5.7% | +2.54 | 1 | 0 | |
| 3 | ▼1 | Advance China IP Law Office Co., Ltd. | 215 | 5.1% | -0.75 | 2 | 0 | |
| 4 | ▼1 | Beijing Unitalen Intellectual Property Co., Ltd. | 149 | 3.5% | -1.66 | 0 | 0 | |
| 5 | ▼1 | 深圳市精英商标事务所 | 105 | 2.5% | -0.65 | 1 | 0 | |
| 6 | ▲435 | 山东白兔商标代理有限公司 | 90 | 2.1% | +2.13 | 0 | 0 | |
| 7 | ▲238 | 北京正理知识产权代理有限公司 | 74 | 1.8% | +1.69 | 0 | 0 | |
| 8 | ▼2 | 北京尚伦律师事务所 | 66 | 1.6% | -0.67 | 0 | 0 | |
| 9 | ▲20 | Shanghai Patent & Trademark Law Office, LLC. | 63 | 1.5% | +0.99 | 2 | 1 | |
| 10 | New | 武汉中北知识产权代理有限公司 | 62 | 1.5% | +1.48 | 0 | 0 | |
+568 ranked firmsFull table | ||||||||
Families each firm handled, 2023–2025. Arrows show the rank change since 2020–2022.
Technology
| Overall | 1–5Chemicals and health | 6–8, 12–13Metals, machines and vehicles | 9–11Electronics and instruments | 14–21, 28Household, leisure and materials | 22–27Textiles and clothing | 29–34Food and drink | 35–38, 42Business and technology services | 39–41, 43–45Transport, education and personal services | |
|---|---|---|---|---|---|---|---|---|---|
| CCPIT Patent and Trademark Law Office | #1 | 2 | 1 | 3 | 1 | 2 | 1 | 1 | 1 |
| BEIJING WANHUIDA INTELLECTUAL PROPERTY AGENCY CO., LTD. | #2 | 1 | 2 | 1 | 2 | 1 | 2 | 2 | 2 |
| Advance China IP Law Office Co., Ltd. | #3 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 3 |
Rank in each Nice class group, by trademark filings 2023–2025. Overall: rank in the whole corridor, shown as a band beyond 10th.
Applicants
| # | Applicant | Families | Offices per family |
|---|---|---|---|
| 1 | Huawei Technologies Co., Ltd. | 3,641 | 2.17 |
| 2 | BOE TECHNOLOGY GROUP CO LTD | 2,750 | 1.39 |
| 3 | Beijing Xiaomi Mobile Software Co., Ltd. | 1,847 | 2.07 |
| 4 | Ningde Contemporary Amperex Technology Co., Limited | 1,599 | 2.83 |
| 5 | GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD. | 1,318 | 2.23 |
| 6 | ZTE CORP | 1,047 | 2.74 |
| 7 | Tencent America LLC | 705 | 1.91 |
| 8 | HONOR DEVICE CO LTD | 556 | 1.99 |
| 9 | LENOVO BEIJING CO LTD | 461 | 2.27 |
| 10 | NOKIA SHANGHAI BELL CO LTD | 429 | 2.18 |
+1,648 ranked applicants | |||
Top 10 by patent families filed abroad, 2020–2022.
Method
| Measure | What it counts | Minimum |
|---|---|---|
| Volume | Families a firm handled in the corridor | 10 families |
| Momentum | Change in market share since the previous period | 10 families |
| Breadth | Firms on the other side it worked with | 10 families, 3 partners |
| Openness | Partners that are new in the last two years | 10 families, 3 partners |
| Reach | Other IP5 offices an applicant files in, per family | 100 families |
SourcesPublished records of the IP5 offices and EUIPO
PeriodsPatents: 2020–2022 vs 2017–2019, by priority year. Trademarks: 2023–2025 vs 2020–2022, by filing year.
Not rankedIndividuals, in-house IP teams, applicant–firm pairs
Ranks come from the data only. Subscriptions, payments and partnerships never change a rank.
Corrections close on December 2, 2026. The corrected edition is 2026.1.No corrections yetReport an error