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 | ||||||
|---|---|---|---|---|---|---|---|---|
| 1 | ▲2 | Liu Shen & Associates | 3,103 | 6.7% | +1.35 | 96 | 3 | |
| 2 | ▼1 | China Patent Agent (H.K.) Ltd. | 3,066 | 6.6% | -1.05 | 104 | 3 | |
| 3 | ▲1 | CCPIT Patent and Trademark Law Office | 2,791 | 6.0% | +1.08 | 145 | 16 | |
| 4 | ▼2 | NTD Patent & Trademark Agency Ltd. | 2,479 | 5.4% | -0.24 | 102 | 9 | |
| 5 | ▲2 | Beijing King & Wood Mallesons | 2,192 | 4.8% | +1.15 | 74 | 4 | |
| 6 | ▼1 | Shanghai Patent & Trademark Law Office, LLC. | 2,190 | 4.7% | +0.80 | 83 | 7 | |
| 7 | ▲2 | Beijing Unitalen Intellectual Property Co., Ltd. | 1,535 | 3.3% | -0.12 | 116 | 12 | |
| 8 | ▼2 | China Science Patent & Trademark Agent Ltd. | 1,346 | 2.9% | -0.73 | 81 | 7 | |
| 9 | ▼1 | Lee and Li-Leaven IPR Agency Ltd. | 1,245 | 2.7% | -0.80 | 56 | 6 | |
| 10 | · | BEIJING ZHONGZI LAW OFFICE | 1,187 | 2.6% | -0.45 | 73 | 6 | |
+3,294 ranked firmsFull table | ||||||||
Families each firm handled, 2020–2022. Arrows show the rank change since 2017–2019.
Technology
| Overall | AHuman necessities | BOperations and transport | CChemistry and metallurgy | DTextiles and paper | EFixed constructions | FMechanical engineering | GPhysics | HElectricity | |
|---|---|---|---|---|---|---|---|---|---|
| Liu Shen & Associates | #1 | 3 | 3 | 3 | 6 | 10 | 5 | 1 | 1 |
| China Patent Agent (H.K.) Ltd. | #2 | 1 | 1 | 2 | 3 | 3 | 1 | 2 | 6 |
| CCPIT Patent and Trademark Law Office | #3 | 2 | 2 | 1 | 1 | 4 | 4 | 3 | 3 |
| NTD Patent & Trademark Agency Ltd. | #4 | 6 | 4 | 4 | 4 | 2 | 6 | 4 | |
| Beijing King & Wood Mallesons | #5 | 2 | 5 | 5 | |||||
| Shanghai Patent & Trademark Law Office, LLC. | #6 | 10 | 6 | 4 | 2 | ||||
| Beijing Unitalen Intellectual Property Co., Ltd. | #7 | 9 | 5 | 10 | 7 | 7 | 3 | 7 | 10 |
| BEIJING ZHONGZI LAW OFFICE | #10 | 3 | 6 | 5 | 1 | 7 | 10 | ||
| Beijing Kangxin Intellectual Property Agency Co., Ltd. | Top 5% | 8 | 2 |
Rank in each IPC section, by patent families 2020–2022. 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