The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.
- Technical field: Pharmaceutical (pharmaceutical composition, medicine, API, production method of thereof, etc.)
- Status: Japanese granted patents in 2017 (registration date).
- First country: Japan (i.e., (i) patents with claiming priority of a Japanese application, (ii) patents based on Japanese domestic application, or (iii) patents based on PCT application whose receiving office is 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||100||The Patent Corporate Body Aruga Patent Office||View|
|2||82||Takashima International Patent Office||View|
|3||75||SAEGUSA & Partners||View|
|4||73||Hiraki & Associates||View|
|5||54||Aoyama & Partners||View|
|6||44||Soei Patent & Law Firm||View|
|7||40||Shimizu Patent Office||View|
|8||37||SIKs & Co.||View|
|9||37||Iwatani Patent Office||View|
|10||33||SEIWA PATENT & LAW||View|
|11||31||TSUKUNI & ASSOCIATES||View|
|12||28||YUASA AND HARA||View|
|13||25||Hirota, Nagare & Associates||View|
|14||25||Abe, Ikubo & Katayama||View|
|15||22||SHIGA International Patent Office||View|
|16||22||In-house patent attorney||－|
|17||21||Moegi Patent Office||View|
|18||21||TAIYO, NAKAJIMA & KATO||View|
|19||19||Hirota & Associates||View|
|20||19||IP Firm SHUWA||View|
|22||18||Eimei Patent Office||None|
|23||18||CENTCREST IP Attorneys||View|
|24||18||In-house patent attorney||－|
|26||15||Asamura Patent Office, p.c.||View|
|27||14||In-house patent attorney||－|
|28||14||Patent corporate body ARCO PATENT OFFICE||View|
|29||13||YuNeed International Patent Office||View|
|30||13||Nakamura & 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.