The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.
- Technical field: Diagnosis (diagnosis agent/method, detecting agent/method of cancer/dementia, 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||20||Shimizu Patent Office||View|
|3||15||Aoyama & Partners||View|
|4||14||Hiraki & Associates||View|
|5||11||Abe, Ikubo & Katayama||View|
|6||8||SEIWA PATENT & LAW||View|
|7||7||Soei Patent & Law Firm||View|
|8||7||YuNeed International Patent Office||View|
|9||6||Takashima International Patent Office||View|
|10||6||SAEGUSA & Partners||View|
|11||6||CENTCREST IP Attorneys||View|
|12||5||SK Intellectual Property Law Firm||View|
|13||5||IP Firm SHUWA||View|
|14||5||SHIGA International Patent Office||View|
|15||5||HATTA & 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.