China patent firms that work most with Europe firms

Ranked by patent family observations each China firm shares with Europe firms, 2013–2022. A family is counted once for each Europe firm it was shared with, so the same family can appear more than once. Later years are left out because many filings are not published yet.

#	Firm	Family observations with Europe firms	Europe firms
1	China Patent Agent (H.K.) Ltd.	27,082	763
2	NTD Patent & Trademark Agency Ltd.	17,487	472
3	Liu Shen & Associates北京市柳沈律师事务所	14,961	511
4	CCPIT Patent and Trademark Law Office中国贸促会专利商标事务所	14,296	676
5	Beijing King & Wood Mallesons	13,775	357
6	Beijing Unitalen Intellectual Property Co., Ltd.集佳知识产权代理有限公司	11,203	505
7	BEIJING ZHONGZI LAW OFFICE	11,109	415
8	Shanghai Patent & Trademark Law Office, LLC.上海专利商标事务所有限公司	10,450	429
9	China Science Patent & Trademark Agent Ltd.中科专利商标代理有限责任公司	9,337	351
10	China Sinda Intellectual Property Ltd.中原信达知识产权代理有限责任公司	9,155	355
11	Beijing Sanyou Intellectual Property Agency Ltd.北京三友知识产权代理有限公司	8,254	416
12	Beijing Kangxin Intellectual Property Agency Co., Ltd.北京康信知识产权代理有限责任公司	8,122	407
13	Beijing Linda Liu Intellectual Property Agency Office (General Partnership)	6,168	243
14	AFD China Intellectual Property Law Office北京安信方达知识产权代理有限公司	5,454	378
15	Leader Patent & Trademark Firm	4,664	217
16	Beijing Beyond Patent Law Office	3,900	245
17	Tee & Howe Intellectual Property Attorneys	3,777	227
18	Guangzhou Scihead Patent Trademark Agency Co., Ltd.广州三环专利商标代理有限公司	3,614	144
19	China PAT Intellectual Property Office	3,472	297
20	Dragon Intellectual Property Law Firm北京银龙知识产权代理有限公司	3,242	244
21	Beijing East IP Ltd.北京东方亿思知识产权代理有限责任公司	3,113	187
22	TDIP&PARTNERS	3,014	111
23	Lung Tin Intellectual Property Agent Ltd.	3,012	241
24	Beijing ZBSD Patent & Trademark Agent Ltd.北京中博世达专利商标代理有限公司	2,856	79
25	GE CHENG & CO., LTD	2,382	182

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