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 2018 (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||80||SHIGA International Patent Office||View|
|2||79||SUZUYE & SUZUYE Intellectual Property Law||View|
|3||76||KATAYAMA & PARTNERS||View|
|4||69||ITOH International Patent Office||View|
|5||44||Fukami Patent Office, P.C.||View|
|6||44||Sanno Patent Office||View|
|7||43||Miyazaki & Metsugi||View|
|8||39||SEIWA PATENT & LAW||View|
|9||38||In-house patent attorney||－|
|10||37||Kaede Patent Attorneys' Office||View|
|11||36||Sakai International Patent Office||View|
|12||34||RYUKA IP LAW FIRM||View|
|13||31||ASAHI & MASUDA PATENT & TRADEMARK ATTORNEYS||View|
|15||30||I.F. PARTNERS Patent Attorneys||View|
|16||27||Miyoshi & Miyoshi||View|
|17||27||ONDA TECHNO Intl. Patent Attys||View|
|18||27||Sonderhoff & Einsel||View|
|19||26||Sato International Patent Firm||View|
|20||26||PRIMEWORKS IP Attorneys||View|
|21||26||Nakajima & Associates IP Firm||View|
|22||25||Yamakawa International Patent Office||View|
|23||24||In-house patent attorney||－|
|24||23||Sohshin International Patent Office||View|
|25||22||HIBIKI IP LAW FIRM||View|
|26||22||KYOWA PATENT AND LAW OFFICE||View|
|27||20||SUGIMURA & Partners||View|
|29||20||KOKUBUN INTERNATIONAL PATENTS & TRADEMARKS||View|
|30||20||S. SOGA & CO.||View|
|31||19||Sano Patent Office||View|
|32||19||Washida & Associates||View|
|33||19||Aoyama & Partners||View|
|34||17||TAIYO, NAKAJIMA & KATO||View|
|35||16||Soei Patent & Law Firm||View|
|36||16||In-house patent attorney||－|
|37||16||Patent Attorney's Office Yoshida, Yoshitake and Arita||View|
|38||16||Nishikawa & Associates||View|
|40||15||TAKADA, TAKAHASHI & 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.