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: 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).
|Ranking||No.||IP law firm||Website|
|1||101||SHIGA International Patent Office||View|
|2||89||ITOH International Patent Office||View|
|3||73||NAKAO & ASSOCIATES||View|
|4||53||Sakai International Patent Office||View|
|5||44||SUZUYE & SUZUYE Intellectual Property Law||View|
|6||35||Kashima & Associates||View|
|7||30||OHCHI INTERNATIONAL IP||View|
|8||26||Nagoya International Patent Firm||View|
|9||25||Minami International Patent Firm||None|
|10||24||Osuga & Associates||View|
|11||22||CHUO INTERNATIONAL PATENT FIRM||View|
|12||20||Prospec Patents & Trademarks||View|
|13||20||Sanno Patent Office||View|
|14||19||Shobayashi International Patent &Trademark Office||View|
|15||18||Okada Patent Firm||View|
|16||18||Ohtsuka Patent Office||View|
|17||16||Aoyama & Partners||View|
|18||15||HARAKENZO WORLD PATENT & TRADEMARK||View|
|19||14||Ogawa International Patent Firm||None|
|20||14||In-house patent attorney||－|
|21||14||Intect International Patent Office||View|
|22||13||Miyoshi & Miyoshi||View|
|24||13||Yoshida & Wakabayashi IP Firm||View|
|25||13||Takahashi Patent Firm||None|
|26||12||SEIWA PATENT & LAW||View|
|27||12||TAIYO, NAKAJIMA & KATO||View|
|28||12||Tsutsui Patent Firm||None|
|29||12||In-house patent attorney||－|
|30||11||NII Patent Firm||View|
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.