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: 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||177||SUZUYE & SUZUYE Intellectual Property Law||View|
|2||162||ITOH-SHIN PATENT OFFICE||View|
|3||129||Toranomon Intellectual Property Firm||View|
|4||116||Sakai International Patent Office||View|
|5||106||In-house patent attorney||－|
|6||104||Ohtsuka Patent Office||View|
|7||101||SHIGA International Patent Office||View|
|8||91||TAIYO, NAKAJIMA & KATO||View|
|10||73||Tokyo International Parent Firm||View|
|11||67||Koyo International Patent Firm||View|
|12||61||SUGIMURA & Partners||View|
|13||57||Misawa Patent, p.c.||View|
|14||55||IP Firm SHUWA||View|
|15||53||Washida & Associates||View|
|16||52||Polaire Intellectual Property Corporation||View|
|17||51||Soei Patent & Law Firm||View|
|18||46||Olive International Patent Office||View|
|19||45||In-house patent attorney||－|
|20||45||TADA, MIYAGAWA & HORII Patent, Trademark and Design Agents||View|
|21||44||LUKE'S International Patent Firm||None|
|22||36||YKI Intellectual Property Attorneys||View|
|23||34||HATTA & ASSOCIATES||View|
|24||33||Sonare IP Firm||View|
|25||33||Matsuura & Associates||View|
|26||33||Isono International Patent Office, P. C.||View|
|27||31||Toho International Patent & Law Office||View|
|28||31||SATO & ASSOCIATES||View|
|29||31||Aoyama & Partners||View|
|30||31||Okabe International Patent Office||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.