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

  • Technical field:  Sound (digital audio processing, tuning device, speech processing, voice search, noise cancellation, microphone, piano, electronic instrument, etc.)
  • Status:  All (i.e., Japanese patent applications in 2016 (application date)).
  • First country:  All (i.e., patent applications with claiming priority of a Japanese application or a foreign application, or without claiming priority).
  • Count:  The number of Japanese patent applications handled by each Japanese IP law firm was counted (applicants of the patent applications are represented by each Japanese IP law firm or its members).
RankingNo.IP law firmWebsite 
1119SHIGA International Patent Office View
284ITOH International Patent Office View
365Sakai International Patent Office View
453NAKAO & ASSOCIATES View
543OHCHI INTERNATIONAL IP View
636Hazuki International View
736Takahashi Hayashi and Partner Patent Attorneys inc. View
834SUZUYE & SUZUYE Intellectual Property Law View
931Isshiki & Co. View
1030Asahi Patent Firm View
1129TAIYO, NAKAJIMA & KATO View
1229HARAKENZO WORLD PATENT & TRADEMARK View
1327Matsumoto Patent Firm (Takashi Matsumoto)None
1427Rise Patent Firm View
1526IP Firm SHUWA View
1624NEXT International View
1723Prospec Patents & Trademarks View
1822CHUO INTERNATIONAL PATENT FIRM View
1922Osuga & Associates View
2021TMI Associates View
2120Minami International Patent FirmNone
2219Sankyo International Patent Attorneys Office View
2318Fukami Patent Office, P.C. View
2418Ohtsuka Patent Office View
2517Aoyama & Partners View
2617Nagoya International Patent Firm View
2716RYUKA IP LAW FIRM View
2816AMANO and Parters View
2916kashima & Associates View
3016SHUSAKU・YAMAMOTO 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, Sound 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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