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 2019 (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||Website|
|1||758||SHIGA International Patent Office||View|
|2||541||SUZUYE & SUZUYE Intellectual Property Law||View|
|3||484||ITOH International Patent Office||View|
|4||184||RYUKA IP LAW FIRM||View|
|5||177||SEIWA PATENT & LAW||View|
|7||150||Ohtsuka Patent Office||View|
|8||143||TANI & ABE, p.c.||View|
|9||140||Nakamura & Partners||View|
|10||122||Sonoda & Kobayashi||View|
|11||101||Fukami Patent Office, P.C.||View|
|13||83||KYOWA PATENT AND LAW OFFICE||View|
|14||67||NII Patent Firm||View|
|15||64||Okabe International Patent Office||View|
|17||57||Sakai International Patent Office||View|
|18||56||KAWAGUTI & PARTNERS||View|
|19||52||ONDA TECHNO Intl. Patent Attys||View|
|20||47||YUASA AND HARA||View|
|21||47||HIBIKI IP LAW FIRM||View|
|22||42||Aoyama & Partners||View|
|23||40||Shinjyu GLOBAL IP||View|
|24||36||Sonderhoff & Einsel||View|
|26||34||S. SOGA & CO.||View|
|27||34||Miyoshi & Miyoshi||View|
|28||33||Soei Patent & Law Firm||View|
|29||30||Washida & Associates||View|
|30||28||SUGIMURA & Partners||View|
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.