The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.
- Technical field: Medical device (syringe, stent, endoscope apparatus, X-ray imaging apparatus, 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||446||SHINSEI PATENT OFFICE||View|
|2||360||ITOH International Patent Office||View|
|3||304||SHIGA International Patent Office||View|
|5||241||SUZUYE & SUZUYE Intellectual Property Law||View|
|6||196||SEIWA PATENT & LAW||View|
|7||172||Nakamura & Partners||View|
|8||171||In-house patent attorney||－|
|9||166||ONDA TECHNO Intl. Patent Attys||View|
|10||163||ITOH-SHIN PATENT OFFICE||View|
|11||148||Toranomon Intellectual Property Firm||View|
|12||142||SUBARU PATENT OFFICE||View|
|13||135||TANI & ABE, p.c.||View|
|14||127||Sakai International Patent Office||View|
|15||125||YUASA AND HARA||View|
|17||117||Ohtsuka Patent Office||View|
|18||113||TAIYO, NAKAJIMA & KATO||View|
|19||111||Aoyama & Partners||View|
|20||106||In-house patent attorney||－|
|21||101||Fukami Patent Office, P.C.||View|
|22||94||Soei Patent & Law Firm||View|
|23||88||SUGIMURA & Partners||View|
|24||87||In-house patent attorney||－|
|26||80||YKI Intellectual Property Attorneys||View|
|28||73||Tokyo International Parent Firm||View|
|29||67||Koyo International Patent Firm||View|
|30||67||Sonderhoff & Einsel||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.