The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.
- Technical field: Electronic circuit (electronic circuit device/component, semiconductor integrated circuit, etc.)
- Status: Japanese granted patents in 2017 (registration date).
- First country: All (i.e., patents with claiming priority of a Japanese application or a foreign application, or without claiming 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||83||SHIGA International Patent Office||View|
|2||80||SUZUYE & SUZUYE Intellectual Property Law||View|
|3||68||ITOH International Patent Office||View|
|4||45||In-house patent attorney||－|
|5||42||SEIWA PATENT & LAW||View|
|6||40||Fukami Patent Office, P.C.||View|
|7||40||Miyoshi & Miyoshi||View|
|9||33||Nakajima & Associates IP Firm||View|
|10||33||KATAYAMA & PARTNERS||View|
|11||32||ASAHI & MASUDA PATENT & TRADEMARK ATTORNEYS||View|
|12||31||Sonderhoff & Einsel||View|
|13||28||Kaede Patent Attorneys' Office||View|
|14||26||Miyazaki & Metsugi||View|
|15||25||Sakai International Patent Office||View|
|16||25||Yamakawa International Patent Office||View|
|17||23||S. SOGA & CO.||View|
|18||22||Sanno Patent Office||View|
|19||22||I.F. PARTNERS Patent Attorneys||View|
|20||21||In-house patent attorney||－|
|21||21||HIBIKI IP LAW FIRM||View|
|22||20||ONDA TECHNO Intl. Patent Attys||View|
|24||17||In-house patent attorney||－|
|25||16||Sato International Patent Firm||View|
|26||16||TAIYO, NAKAJIMA & KATO||View|
|27||15||Patent Attorney's Office Yoshida, Yoshitake and Arita||View|
|28||15||Washida & Associates||View|
|29||14||KYOWA PATENT AND LAW OFFICE||View|
|30||14||CHUBU PATENT OFFICE||View|
|31||14||Hattori & Associates||View|
|32||14||Aoyama & Partners||View|
|33||13||KOKUBUN INTERNATIONAL PATENTS & TRADEMARKS||View|
|34||13||RYUKA IP LAW FIRM||View|
|35||12||Sano Patent Office||View|
|36||12||WAKABAYASHI PATENT AGENCY||View|
|37||12||PRIMEWORKS IP Attorneys||View|
|38||11||TAKADA, TAKAHASHI & PARTNERS||View|
|39||11||Nagoya International Patent Firm||View|
|40||11||NII Patent Firm||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.