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 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).
RankingNo.IP law firmWebsite
125In-house patent attorney
222SIKs & Co. View
322U'sfi Patent Attorneys International Office View
415SHIGA International Patent Office View
514In-house patent attorney
613I.F. PARTNERS Patent Attorneys View
713Yoshida & KondoN/A
811TMI Associates View
109Tsujimaru International Patent Office View
119YASUTOMI & Associates View
128Ochanomizu International Patent Office View
138Hirota, Nagare & Associates View
157Shorai International Patent Firm View
167SAEGUSA & Partners View
177Ohtani Patent Office View
187Esaki & Associates View
197Fujimoto Patent & Law Office View
206Koh-Ei Patent Firm, P.C. 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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