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

  • Technical field:  IoT (IoT technology having broad facet classification: safe driving support system, study support system, smart kitchen devices, 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
111Sakai International Patent Office View
29TMI Associates View
38ITOH International Patent Office View
47Nakamura & Partners View
56SHIGA International Patent Office View
75Fukami Patent Office, P.C. View
84Ohtsuka Patent Office View
94Sonoda & Kobayashi View
104Shobayashi International Patent &Trademark Office 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, IoT 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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