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 2019 (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||77||SHIGA International Patent Office||View|
|2||54||ITOH International Patent Office||View|
|3||53||SUZUYE & SUZUYE Intellectual Property Law||View|
|4||50||KATAYAMA & PARTNERS||View|
|5||49||Sakai International Patent Office||View|
|6||41||Fukami Patent Office, P.C.||View|
|7||39||In-house patent attorney||－|
|8||39||Miyazaki & Metsugi||View|
|9||38||Sanno Patent Office||View|
|11||33||KYOWA PATENT AND LAW OFFICE||View|
|12||33||SEIWA PATENT & LAW||View|
|13||31||NII Patent Firm||View|
|14||31||I.F. PARTNERS Patent Attorneys||View|
|15||29||Miyoshi & Miyoshi||View|
|16||28||Sato International Patent Firm||View|
|17||26||ASAHI & MASUDA PATENT & TRADEMARK ATTORNEYS||View|
|18||26||Yamakawa International Patent Office||View|
|19||26||Aoyama & Partners||View|
|20||24||In-house patent attorney||－|
|21||23||Sohshin International Patent Office||View|
|22||23||RYUKA IP LAW FIRM||View|
|23||23||Sonderhoff & Einsel||View|
|24||22||HIBIKI IP LAW FIRM||View|
|25||22||TAIYO, NAKAJIMA & KATO||View|
|26||21||ONDA TECHNO Intl. Patent Attys||View|
|27||21||SUGIMURA & Partners||View|
|28||20||SOCO IP LAW FIRM||View|
|29||19||Kaede Patent Attorneys' Office||View|
|30||19||Soei Patent & Law Firm||View|
|31||18||Sonoda & Kobayashi||View|
|32||18||TAKADA, TAKAHASHI & PARTNERS||View|
|33||17||Sano Patent Office||View|
|35||16||Nakajima & Associates IP Firm||View|
|36||16||PRIMEWORKS IP Attorneys||View|
|37||16||Ohtsuka Patent Office||View|
|39||15||In-house patent attorney||－|
|40||13||TSUTSUI & ASSOCIATES||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.