The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.

  • Technical field:  Clothing (shirt, shirt collar, bra, wetsuit, hair extension, footwear, belt, flame resistant garment, 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
182Showa International Patent Firm View
259SEIWA PATENT & LAW View
353Isshiki & Co. View
447Shirahama International Patent FirmNone
537Nagai International Patent Bureau View
628Ai Association of Patent and Trademark Attorneys View
727Hirose International Patent Firm View
823Felicite Patent Professional Corporation View
922Sakamoto & Partners View
1017U'sfi Patent Attorneys International Office View
1116Soei Patent & Law Firm View
1216Izumi Patent FirmNone
1316KYOWA PATENT AND LAW OFFICE View
1414SHUSAKU・YAMAMOTO View
1514Ikeuchi & Partners View
1613SHIGA International Patent Office View
1713Koyo International Patent Firm View
1812YAMAMURA PATENT ATTORNEYS OFFICE View
1911Miyoshi & Miyoshi View
2011Nakamura & Partners 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, Clothing 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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