<2021-Foreign> Firm Ranking of the number of Japanese granted patents in the Electric communication field in 2021

2022.09.25 2022.10.05

The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.

Technical field: Electric communication (smartphone, cell phone, wireless network, video streaming, videoconference device, user authentication system, etc.)
Status: Japanese granted patents in 2021 (registration date).
First country: Foreign (i.e., patents with claiming priority of a foreign application, or patents based on PCT application whose receiving office is not Japan Patent Office without claiming any priority).
Count: The number of patents handled by each Japanese IP law firm was counted (if the applicant is represented by a firm member (attorney), it was counted as being handled by the firm).

Ranking	No.	IP law firm	Web
1	711	SHIGA International Patent Office	View
2	435	ITOH International Patent Office	View
3	284	SUZUYE & SUZUYE Intellectual Property Law	View
4	228	SEIWA PATENT & LAW	View
5	215	KYOWA PATENT AND LAW OFFICE	View
6	191	Ohtsuka Patent Office	View
7	167	Sonoda & Kobayashi	View
8	165	SHUSAKU・YAMAMOTO	View
9	153	RYUKA IP LAW FIRM	View
10	149	TANI & ABE, p.c.	View
11	142	Nakamura & Partners	View
12	109	TMI Associates	View
13	101	Fukami Patent Office, P.C.	View
14	79	NII Patent Firm	View
15	69	Washida & Associates	View
16	55	OHNO & PARTNERS	View
17	53	YUASA AND HARA	View
18	50	Sakai International Patent Office	View
19	46	Aoyama & Partners	View
20	45	Okabe International Patent Office	View
21	43	HIBIKI IP LAW FIRM	View
22	38	ONDA TECHNO Intl. Patent Attys	View
23	34	Curiuse	View
24	34	SUGIMURA & Partners	View
25	34	S. SOGA & CO.	View
26	28	TAIYO, NAKAJIMA & KATO	View
27	27	Shinjyu GLOBAL IP	View
28	27	World IP Law	View
29	27	In-house patent attorney	－
30	27	Sonderhoff & Einsel	View
31	27	Okada Patent Firm	View
32	26	Asamura Patent Office, p.c.	View
33	26	HARAKENZO WORLD PATENT & TRADEMARK	View
34	25	TRY International IP LAW FIRM	View
35	23	Hiraki & Associates	View
36	22	Kai-U Patent Law Firm	View
37	22	Miyoshi & Miyoshi	View
38	21	Unius Patent Attorneys Office	View
39	21	Shin-Ei Patent Firm, P.C.	View
40	21	INFORT PATENT FIRM	View
41	20	Okuyama & Sasajima	View
42	20	KAWAGUTI & PARTNERS	View
43	19	Soei Patent & Law Firm	View
44	19	Kyosei International Patent Office	View
45	18	PRIMEWORKS IP Attorneys	View
46	17	HIROE AND ASSOCIATES, patent professional corporation	View
47	16	Yamakawa International Patent Office	View
48	16	SANSUI PATENT FIRM	View
49	15	ZHENGLIN	N/A
50	15	Katayose Patent	View

In preparing the table, a patent search expert conducted a patent search using patent classification and keywords (as necessary) in order to extract patents in specific technical field (here, Electric communication field).
In the patent search, it was confirmed that a high-accuracy population (i.e., a population not including non-relevant fields) of patents was obtained. Subsequently, the population was used to create the table.

By entering the Firm name or Attorney name in the "Legal Representative Name" column of Patentscope (search system of WIPO), you can find the patent information handled by each Firm.