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 2017 (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||736||SUZUYE & SUZUYE Intellectual Property Law||View|
|2||637||SHIGA International Patent Office||View|
|3||567||ITOH International Patent Office||View|
|5||212||TANI & ABE, p.c.||View|
|6||193||SEIWA PATENT & LAW||View|
|7||149||RYUKA IP LAW FIRM||View|
|8||146||Nakamura & Partners||View|
|9||142||Ohtsuka Patent Office||View|
|11||89||NII Patent Firm||View|
|13||84||Okabe International Patent Office||View|
|14||72||KAWAGUTI & PARTNERS||View|
|16||71||Sonoda & Kobayashi||View|
|17||68||HIBIKI IP LAW FIRM||View|
|18||68||Aoyama & Partners||View|
|19||63||ONDA TECHNO Intl. Patent Attys||View|
|21||56||Fukami Patent Office, P.C.||View|
|22||51||Unius Patent Attorneys Office||View|
|23||49||KYOWA PATENT AND LAW OFFICE||View|
|24||47||S. SOGA & CO.||View|
|25||47||Hiraki & Associates||View|
|26||43||Kyosei International Patent Office||View|
|27||38||HARAKENZO WORLD PATENT & TRADEMARK||View|
|28||37||YUASA AND HARA||View|
|29||34||Washida & Associates||View|
|30||34||Takahashi Hayashi and Partner Patent Attorneys inc.||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.