South Korea patent firms that work most with Japan firms

Ranked by patent family observations each South Korea firm shares with Japan firms, 2013–2022. A family is counted once for each Japan 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 Japan firms	Japan firms
1	Kim & Chang	18,911	576
2	KOREANA Patent Firm특허법인 코리아나	11,019	432
3	Lee International Patent Law Office리인터내셔날특허법률사무소	6,302	312
4	FirstLaw P.C.제일특허법인	5,078	230
5	YOU ME PATENT & LAW FIRM유미특허법인	3,627	263
6	Bae, Kim & Lee LLC	3,581	166
7	Ha Combined Patent하합동특허법률사무소	3,263	223
8	WithMe International Patent Law Office위드미국제특허법률사무소	3,157	182
9	HANSUNG IP	2,730	96
10	HANYANG PATENT FIRM	2,029	182
11	Y.P. Lee, Mock & Partners리앤목특허법인	2,020	196
12	PHIL & ONZI INT'L PATENT & LAW FIRM특허법인필앤온지	2,004	127
13	C&S Patent and Law Office	1,966	87
14	Central Law Firm법무법인 센트럴	1,849	126
15	NAM & NAM특허법인 남앤남	1,727	158
16	YOON & YANG (IP) LLC	1,352	141
17	Muhahn Patent & Law Firm특허법인 무한	1,334	176
18	Yoon & Lee Patent & Law Firm윤앤리특허법인	1,321	106
19	KBK & Associates	1,317	57
20	Moon & Moon International Patent Law Office문앤문국제특허법률사무소	1,262	93
21	Y.S.CHANG & ASSOCIATES	1,204	141
22	WOOIN IP Law Firm특허법인 우인	1,135	50
23	Resigned - Office Change Pending	1,081	80
24	DIME Patent Office특허사무소 다임	1,038	156
25	MAPS Intellectual Property Law Firm특허법인 MAPS	886	97

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