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

  • Technical field:  Hybrid car (Hybrid car technology having broad facet classification: control device, power supply system, electric power conversion device for hybrid vehicle, 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).
RankingNo.IP law firmWebsite
172Fukami Patent Office, P.C. View
240CREO Law & Intellectual Property View
332Watanabe International Patent Office View
426ITEC International Patent Firm View
522HATTORI & PARTNERS View
621MAEDA & PARTNERS View
720Aoyama & Partners View
820Sakai International Patent Office View
920Sankyo International Patent Attorneys Office View
1020YKI Intellectual Property Attorneys View
1119Kyoritsu International View
1219GOTOH & PARTNERS View
1318ONDA TECHNO Intl. Patent Attys View
1417R&C IP Law Firm View
1517Ikeda Patent Office View
1615Tokyo Central Patent Firm View
1714Seiryu International Patent FirmNone
1814SHIGA International Patent Office View
1913TSUTSUI & ASSOCIATES View
2013AICHI, Takahashi, Iwakura & Associates View
2113Kyosei International Patent Office View
2213S. SOGA & CO. View
2313Koh-Ei Patent Firm, P.C. View
2412TMI Associates View
2511Ochiai Patent FirmNone
2610HIKARI PATENT OFFICE View
2710In-house patent attorney
2810AIGI Intellectual Property Law Firm View
2910SUNNEXT International Patent Office View
309Ayata Patent FirmNone
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, Hybrid Car 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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