The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.
- Technical field: Pigment/Dye (inkjet technology, colored composition, color filter, etc.)
- Status: Japanese granted patents in 2017 (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||39||In-house patent attorney||－|
|2||28||SIKs & Co.||View|
|3||27||SHIGA International Patent Office||View|
|4||23||Yoshida & Kondo||None|
|5||19||In-house patent attorney||－|
|6||19||TAIYO, NAKAJIMA & KATO||View|
|7||18||Tsujimaru International Patent Office||View|
|8||16||Sonderhoff & Einsel||View|
|9||15||Ohtani Patent Office||View|
|10||15||Miyoshi & Miyoshi||View|
|11||14||Koh-Ei Patent Firm, P.C.||View|
|12||12||Gyoen Patent Firm||View|
|13||12||Tokyo Central Patent Firm||View|
|14||12||YKI Intellectual Property Attorneys||View|
|15||11||I.F. PARTNERS Patent Attorneys||View|
|16||11||Hirota, Nagare & Associates||View|
|17||11||TANI & ABE, p.c.||View|
|18||10||SEIWA PATENT & LAW||View|
|19||9||KYOWA PATENT AND LAW OFFICE||View|
|20||9||Eikoh Patent Firm, P.C.||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.