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 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).
RankingNo.IP law firmWebsite
129SIKs & Co. View
223In-house patent attorney
320Ohtani Patent Office View
417SHIGA International Patent Office View
514TAIYO, NAKAJIMA & KATO View
614TMI Associates View
713YKI Intellectual Property Attorneys View
812In-house patent attorney
912In-house patent attorney
1011SAEGUSA & Partners View
1111IIDA & PARTNERS View
1211Tsujimaru International Patent Office View
1310WAKABAYASHI PATENT AGENCY View
1410Aoyama & Partners View
1510The Patent Corporate Body Aruga Patent Office View
1610Sonderhoff & Einsel View
1710Anderson Mori & Tomotsune View
189Yoshida & KondoNone
199I.F. PARTNERS Patent Attorneys View
208SEIWA PATENT & LAW View
In preparing the table, a patent search expert conducted a patent search using patent classification and keywords (as necessary) in order to extract patents in specific technical field (here, Pigment/Dye field).
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.

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